Hello! I am also a member of the gym and have bought private classes. I lost weight, and the effect was ok. Such classes are relatively expensive. The coach split it inside. In order to gain muscle, you should eat more high-protein food. The coach will teach you the use of various instruments and standardize your movements. I don't know how strong you are now. As for whether it's worth it or not, you'll know after practice. At least your strength will increase a lot, just don't regret buying it. There is also that fitness is gradual, so we must stick to it and come on!