New to game, how to learn saiyan/wrath

Hey guys. I find the mod descriptions alrdy lackluster, we have moves in the game that give no text as to what they are or do and im trying to learn saiyan and wrath but how am I meant to learn? No guides or anything on google. Most stuff is very obvious but things like charge, power up? Why? What are they actually doing? Ect ect how am I meant to figure that out