Not derailing at all Seems pretty on topic to me. I know exactly what you mean though. How do you learn how to do something that you don’t know how to do yet?
My approach, which worked to some extent, was to use a very “stupid” fretting hand pattern so I could be sure the picking was what I focused on. For me, that was an ascending 4 note arpeggio (broken chord, let ring on clean channel). I tried very hard to only do things that felt “not hard”. For example, I’ve heard plenty of advice to “just learn a forward roll”. Well, I sucked at that, so I abandoned it. That’s when I decided to just work on 4 ascending notes. I found out that I could play the first 2 notes pretty fast. Then I added a third note, then finally all 4 notes. Before I knew what my hands were doing, they had “learned” a motion that could play 4 notes ascending fairly fast. I didn’t try to micromanage anything or “make a curved motion”. I just tried playing those 4 notes fast. I tried lots of different grips and picks and anchors, with lots of various “postures” (how supinated/pronated/flat my hand was)
At some point, I started associating the better feeling/sounding attempts with something I was asking my hands to do. And progress was slow but steady. Within a week, I had this:
Obviously I wasn’t ready to steal gigs from Andy Wood (and I still am not, and I never will be lol). BUT, I’d gotten “the motion” down. That was about a week after I started messing with the whole thing.
What I didn’t try doing was ripping through Tumeni notes though lol!