I’m (re)discovering that learning is a lot of work, 25 years latter. I’m also discovering that it is something like riding a bike: you don’t forget; you just need a little practice to get back on track.
As an aside, I have doubts all the time about my capabilities. Are them still here, somewhere? And I’m finding that they just show up as soon as I put up with the work. It just takes a little faith in myself.
To round this up, a piece of advice: take the leap!