>>47586723you learn over time what works and what does not its experience.
You need sweepers, pokemon that set up hazards, tanks or stall pokemon that can switch in and take a hit for you.
You learn what you need over time my first team was trash now i can beat people who use meta teams without using any type variety myself. Play some casuals and climb the ladder in ranked with a team of bro mons and figure out why you lose and improve on it.
losing is not the end of the world it happens thats how you get better dont be nervous go out there and try to bring the mons you like best to victory even try out some new ones.
some advice monotype teams are a great way to get better at the game you end up using mons you never thought about to cover weaknesses and find out the smogon tiers are not so strict.
a ru mon CAN beat an ubers under the right conditions seen it happen and done it myself