First I’d focus on building a good UL or ML team…forget about the GL because its currently a joke. Pick a team based on the YouTubers advice…avoid any “spicy” teams because they generally don’t work for people who don’t devote their lives to PvP. Record your battles on your phone and learn from your mistakes. Don’t use shadow Mewtwo for PvP. Swampert is awesome in all leagues, so learn how to use it….make a good shadow versions as well. MetaG is fantastic for ML, but otherwise not. Pick a fun team…Cressalia & Giratina are great but so f-ing boring. Don’t use Azu if you have any dignity. Charmers suck, but winning is winning and I respect that and prepare for it.