How to Define What Works and What Doesn't

My main form education was a lot of YouTube. During those times you know after you start losing and blowing 10k counts you definitely get in that downstage at that point I was inside 24 7 watching YouTube 24 7. It's like wettiest star what's valid what works what doesn't how do you how did you distill that down so it was definitely I watched everything um as far as figuring out what works it was back testing.