I am looking for an easy introduction to playing solos. I can read tabs as well as the next person and can understand that this is all I should need to play solos but I am strugging to grip them properly.

I would also like to fully understand the scales if anyone can shed some light in "dumbed-down" speak? I have attempted to learn the solo from 'Thinking out Loud' by Ed Sheeran and can do most of it well, I think understanding the scales would help me improve.

I can play the solos from 'On Call' by KOL and 'Smells Like Teen Spirit' by Nirvana. And basic riffs from various songs like 'Follow me' by Uncle Cracker, 'Gravity' by John Mayer. I'd just like to stp it up a little.