Garageband mixing tips

Hi there,

I'm not a musician per se, just a humble mixer on Mixcloud mainly https://www.mixcloud.com/dominiqueprudhomme/. I master Garageband 10.1.0 correctly but until now I didn't find a way to edit the tracks separately (changing the pitch, tempo, equalization) separately to achieve better transitions. If anyone can help me I would so grateful, after spending too much time watching Youtube tutorials related to GB old versions or unrelated to my needs. Thanks a lot for your help.