Is this why I am having trouble?

So recently I talked with this other player who was helping me understand what to do and play around objectives, as well as using my champion, and a realization struck me. A lot of the time, I usually don't put a lot of thought into actions I take in-game (unless accidentally pressing a button and using an ability or item on accident, then it's thoughtless.) It might be what is holding me back in games since too often I'm not sure what to do next or where to ward or position. I don't play ranked often enough to have a elo to be stuck in, but I will have to force myself to slow down to make better decisions if I want to feel confident I can climb at all.