I believe it is best to train both gi and no gi in BJJ but I think that it is better to spend more time training gi, especially early on. Read more about gi vs no gi here.
There are a lot of things to consider when trying to pick out the best BJJ school. Here is a list of the what you should look for in a school before joining.
There are a lot of things to consider when trying to pick out the best BJJ school. Here is a list of the what you should look for in a school before joining.