Gen 1 to Gen 8 Pokémon kinda daunting I'm pretty much clueless on Gen 6-8 and Gen 5 was bad enough because I didn't know what type most of my opponents were at first
Think Ima dedicate more time to Black 2 and check the hack out if I still want to play more Pokémon after that
Unbound has typings set up for it to be far easier. In every battle it will say what attacks are weak or strong. Lot of quality of life updates on it that prevent you from being confused regarding that kind of stuff