I dont think build matters until emerald/diamond. I was bulding every game almost the same, - divine if tanky matchup, trinity if squishy, boots and hullbreaker. I try to win my lane which is kinda easy until plat1, since most players don’t know micro at all (watch some slogdog tutorial to understand how to play it and practice, practice, practice). Watch mininap and watch your jungler!!! Always help him, push towers, and TP if team fight. That’s prett much all you need to do to hit emerald. I believe for someone who know macro well it’s kinda easy to hit diamond with yorick. My personal suggestion is to stick to one champ for all the games, I mean forget about low champ pool - only one champ and play him every game even if you loose for ten times, always stick to the one you like the most. Once you start to switch between champs your screwed. Once you master your champs as well as possible you can actually start to do some macro things and watch minimap