I'm pretty shitty compared to the guys here but in my opinion the pentatonic and blues scales ("Pentatonic & Blues Scales:" on the "Guitar Lesson PDFs" Page) and chord progressions / repertoire will be most important, .
And technique obviously :)
There are some great videos on it too, like "Solo Basics", "Blues Licks 101" on Pebber's Channel

what got me into Holdsworth was "Devil take the Hindmost", other songs seemed too "out there" for me when I first found out about him

I haven't heard of those but Dava picks seem to be popular here (I know at least one very high speed guitarist who uses them :) ), personally I use the ones with the red grip, I love their grippyness (seems easier to relax the picking hand) and the attack feel

before them I used Dunlop Jazz somethings but now they're much too thick for me

I think I got the sound a little better this time + tried to do a bit of "pebber angle" at the start
Am I on the right track here?

Thanks for pointing it out,
I'll upload another one later, with better audio

Thanks for the reply,
I've rested it for a week now (the pain only occured when playing for 20min, thankfully not all the time) and so far I haven't noticed any pain or anything
I'm uploading a video of a bit of scalpel and pentatonic bits right now

ps: in the video it looks like my right arm is very tense when playing scalpel faster but for what it's worth I dont think it is because it feels pretty loose but the forearm shakes a little back and forth so it looks like I have a death grip on the pick