im so confused about how to climb, i need help

I wanna reach gold this season and hope getting to diamond-challenger someday, though I don't know at what role i'm better, i don't know what should be my main, there is too much champs i know, too much i like, i main someone for some time, then, i start getting bored or getting bad with the champ so i go main someone else or then i start using a team comp tool like lolmasters to see what is the optimal pick for this game. Or i see stats and try picking what is meta or with the highest win rate. I build according to websites, tho im not sure what is the best, op.gg? champion.gg? lolmasters? probuilds? lolalytics?. I rely way too much on stats yet, i dont know i can do better, so much fucking possibilities in this games, i got coached by some high elo players, tho they dont always say the same thing and don't fix my main problem being knowing what the fuck i should play so i just obtain things like climbing to silver 2 all of a sudden and then falling back to silver 5 for whatever reason, be it matchmaking or tilt, having 800 games in one season, having silver 5 rank, getting called bad cause im stuck... and yea i spend way too much time playing that stupid game cause i fucking wanna climb so bad, but i'm not even enjoying it anymore cause im clueless about how to carry the low silver monkeys, my hard-fought wins gets nullified an even or higher number of losses and i dont see any results from my goddamn tryharding.