Would i be overwhelming my child by sending him to enrichment class (Music Class, Gym Class ) at such a young age?

Depending on how old your child is, it is advisable not to overwhelming him with classes. Depending on his age, you could send him to a kindergarten and expose him to things such as music, drama, performing, exercising so on and so forth at a later age. For kids as well as adults, interest and passion is key to not grow tired of possible hobbies.