Originally Posted by: Keys_I've been trying to re do it again and try to put a lot of pressure at first and then loose it til my note are mute so I can find a sweetspot where the note can sound without muting itself.[/quote]

Take your time & be patient with yourself. I've been playing for over 40 years & I still have to remind myself to relax when learning something new or playing something complex.

[quote=Keys_]Another question not related to that; How can I get better at improvisation? At the moment there is not much about improvisation on the lessons and what I've found on the Internet is that I need to learn music theory to do it?

Improvisation requires a vocabulary of things to play that you can draw from. You can start to improvise simply by trygint to recombine things you already know in a new way.

I'm not sure how much skill you've built yet. In order to play lead guitar, to improvise melodies & solos you need the skill of playing single note melodies.

With that in mind, I have a whole series on improvisation here.

https://www.guitartricks.com/collection/learning-to-improvise

Hope that helps!