It's not an easy place to start now there's so many systems and characters in the game, but there's plenty of resources out there to improve. Very different game from SF, MK, and KF mostly because of airdashing and serious blockstring nonsense, it's more explosive than those games.
If you want an easy to learn airdasher that everyone can pick up quickly then you could try P4 Arena. You can probably pick it up very cheap now.