ML practices you wish you had known early on?

hey, i’m 20f and this is actually my first time posting on reddit. I’ve always been a lil weird about posting on social media but lately i’ve been feeling like it’s okay to put myself out there, especially when I’m trying to grow and learn so here i am.

I started out with machine learning a couple of months ago and now that i’ve built up some basic to intermediate understanding, i’d really appreciate any advice -especially things you struggled with early on or wish you had known when you were just starting out