Tips for not suckin balls

I've played some elden ring and a bit of DS1 now, not even that I'm that bad I don't think but definitely not good, but I have a proper issue of overthinking games that people say are hard and then I don't play the game properly and end up second guessing everything I do.

Anyone got any tips? Never know when to use flasks and when to just go at the game, always play overly cautious basically.