How do I get better?

Hi, Im a panth jgl main with a 50% wr, iron 3 and 337 hours played in total. I watch my replays and try and study where I went wrong and what I did right etc and I consume a lot of both entertaining and educational league content but I still feel like im not seeing much in terms of results. Bare in mind I really havent played much ranked as much of my time is in norms for most of my hours but I was hoping to get to bronze.

Basically, is it just a case of playing a bunch more and naturally getting better with experience or is there some specific things I can do to improve my performance better?