Rock climbing is relatively easy for beginners since the beginner routes are usually not complex, and actually resemble climbing a ladder. As the grades go up, so does the complexity and the difficulty of the routes.

Beginner rock climbers can usually climb a few grades up from the easiest one, even if it's their first time climbing. For example, one grading system for bouldering is v0, v1, v2... As you go up in the number, the climbing gets harder, new holds are introduced that are harder to grip and use, climbing moves become bigger and more difficult, and the route itself becomes more complex.

Many times, beginner rock climbers and even those who it's their first time climbing can climb between v0 and v3. Some can even go up to v4 and v5, though, this depends on the climbing gym, and the climber. If the climber is in good shape and has prior experience in sports that could contribute to climbing, they could very quickly go up to climbing harder routes.

As you go up the grades, the difficulty between each grade also goes up.

The amount of times you should climb per week really depends on you and how conditioned your body is to climbing. If you have been climbing for a few years, and you are generally healthy, you may be fine climbing 4 times per week or even more. If you are a new climber, climbing 3 times may be your limit before you start experiencing slight or major injuries, and you may even be able to climb only twice a week.

In the end, the amount of times you can climb per week really depends on you. If you come from a background in sports, and you are a new climber, then maybe you can even push it and go for 3-4 sessions per week, but this is considered risking it because climbing generally uses very specific muscles that most people, even those coming from other sports background, are not used to, and if you overuse these muscles and don't give them the adequate amount of rest, you could just be risking injuries.

The best way to find out is to just experiment. Try going twice a week while having a rest day or two in between, if you are ok with this, try adding another day in, and just keep experimenting with the amount of climbing days and the amount of rest days in between.

Very often, climbers can experience weak days. These are days that they just feel as if they have no power and no energy to climb at the level they normally can. This is not unique to climbing, or to sports in general. It's just part of being human.

Some people feel this way due to fatigue, they may be pushing their body too much and not giving it the amount of rest it needs. This can cause you to just feel very sluggish and weak, resulting in a weak climbing day when you just don't have the energy to climb, or don't have the power to do moves you normally would be able to.

Distractions are also very common. People who are distracted by something and who are not focused on the climbing session can very easily feel this in their climbing. They will just not be in the zone, not be focused on what they are doing, and this can very easily result in not being able to climb at the level you are used to climbing at.

Some climbers may also face medical issues. Depression, for example, is one that can really affect your climbing, and your whole life in general. If you notice that you are just not able to climb and don't feel the way you normally feel, and this feeling lasts, it is highly advised to go see a specialist as this may be something more serious than just an off day.

Having weak climbing days can also be a result of your eating habits. Some people feel very weak and shaky if they don't eat a little bit before their climbing session. Others, on the other hand, may feel the opposite, and eating even a small meal an hour before their climbing session could make them just feel heavy and tired.

You could try remembering or writing down each time this happens and how you were feeling, or what you ate before, or any other important details you may have, and then to try and find a common element shared by these days. This could be a great way to find the cause, and eventually, a solution.

Climbing is a lot of fun and attractive to many people seeking a new hobby or simply to get into a new sport because it is a sport that doesn't require much gear, or even strength, and provides both a physical challenge and a mental challenge.

To be a good climber and to progress in the sport, you do not necessarily have to be very strong. Having good technique, and a good understanding about climbing, about your strengths, and about your climbing style, can give you a great advantage while climbing.

This basically means that anyone who is physically capable can start climbing. You don't have to be strong, you don't have to have previous experience in other sports or at lifting weights. Though those things can help a lot, they are not required, and strength will build as you climb. Understanding climbing and developing good technique can compensate for less physical strength.

Climbing is also a great mental activity and challenge. In bouldering, for example, each route is also known as a problem, the climber must understand the problem and solve it using just their body. This means that they need to understand how the route can be climbed, and how to adapt that solution to their body, or to find a solution that will fit their capabilities.

Very often, the better solution to solving the problem will not be the more powerful solution that requires a lot of strength, but rather, it will be the solution that requires great technique. Though, it can be a combination of having great technique, strength, flexibility, and experience.

So what is fun about climbing is that it really isn't just a physical sport that requires you to be very strong. It is very much a mental challenge as much as it is a physical challenge. So for those who love sports and puzzles, climbing can be a lot of fun.