About how often to train

Of course, in order to answer this question, we need to know about a lot of additional data. And we will start with your physical fitness and goals.

If you are a beginner, then you should start with a fullbody program twice a week, regardless of your goals. That is, in 1 hour you should have time to work out all the main muscle groups. One exercise for each muscle group, 3 sets each. The number of repetitions is about 20-30. This will help you prepare for strength training without risks.
And then, if the goal is to gain mass, then we increase the working weights enough to perform our classic 8-15 repetitions (read the corresponding article to find out how to do it correctly). But we do it gradually, of course, over the course of two or three months.
And if the goal is to lose mass, then it is better to only increase the working weight when it becomes easy to perform 30 repetitions with the current weight. That is, do not reduce the number of approaches in parallel (do not aim for 8-15), but only increase the working weight if necessary. There are serious reasons for choosing this approach, but unfortunately we cannot go into too much detail here.

And here, again, it depends on the goals and physical condition. When gaining mass, there should be a transition to the classic three-day split when your muscle groups will no longer have enough exercise to feel mild post-workout muscle pain.
As for those who lose weight, everything is simpler here. Here we are just talking about one of the reasons why we chose multi-repetitive workouts for losing weight. Since there is little tissue damage during such training, recovery will occur fairly quickly and this will allow us to train much more often according to the fulbody program. We recommend doing a fullbody three times a week with the addition of cardio training on the other days (read how to do this correctly in the corresponding article, and learn weight gain and lose basis here to calculate the calories correctly)

How often should I train?