Beginner to Neville’s teachings and have some questions

I have manifested things before through LOA: studying abroad, weight loss, relationships with people etc. but I was obsessed with results and entered in a rut. I was doing many techniques together and it would just leave me disappointed and angry because I thought I was doing a lot and saw no results and angry at myself for being disappointed and angry because I thought I need to always be ‘high vibrational’. Then I discovered Neville through Joseph Alai. So I have a couple of questions.

1. Do I need to fall asleep immediately after SATS? Because I have trouble falling asleep if I’m focusing on something.

2. On the subject of mental diets: do I need to stop listening to sad music and watching and reading things that make me sad? Because I tend to identify with sad music.

3. Is using techniques such as 55x5 and subliminals(I have made my own) incompatible with Neville’s teachings?

Thank you