Technique Issues

[Paxikonic]

I truly need an advice on the efficient book that will work on my technique. I got stuck and frustrated when I can not play the theme in the right tempo
I could also use an advice on if I should work on my hands separately ??

[FourOnSix]

I don't have an answer to your question, but can only offer my opinion that when it comes to technique, there is no substitute for a teacher.

[MiniMerckx.22]

Andrew Green
Jazz Guitar Technique

[nyc chaz]

The most efficient way to pick to me is economy picking.Chris Brooks Economy Picking Guitar Technique book is a good place to start.You can find videos on YT about this technique.Best to use a metronome and go slow and play the exercises in the book clean before gradually increasing speed.