I saw on your Op.gg that you're an adc main, so here is what I see from gold players when I play flex:
(ESPECIALLY ON CAIT): When your opponent goes up to CS, auto him. This gives them two options. Either A), he misses the CS and autos you back, or B) he takes free damage for that cs. If you do this for every CS possible, it adds up really really quickly. Especially with Cait because your auto range is so long you can auto them while they walk in range and auto them again as they back off.
Rush to level 2. Level 2 is huge, not only for the stats but for the extra skill point. It takes the first wave plus the first 3 melee minions of the next wave. When you're 1 minion away, walk up with your support. They HAVE to back off and you can get a free 3-4 cs lead if they respect it, and kill them if they don't by simply executing the minion to get you level 2 then taking the fight.
Try focusing on getting those two things down because they're pretty important.