The main symptom is that, in the moment, acting upon your desires never feels urgent. It never feels important, and can be put off. Or it never feels possible, the problem just feels like a fact of life. And so a solution must center on solving the problem in the moment. And the solution that worked for me, is to make it part of your identity to be an agent. Make it a point of principle to do things, not because the thing is necessarily the perfect action, but because I choose the life where I do things, over the life where I always wait for the perfect opportunity.
The point of this, is that I avoid the paralysing perfectionism and uncertainty by changing the question I am answering. It doesn’t matter if I’m not doing the right thing, because what I’m doing isn’t that important. I can close off the paralysing thoughts, not by answering them on their own terms, but by realising that the choices I make today affect the kind of person I’ll be for the rest of my life. And that that’s far more important than whatever trivial bullshit is going in my life today. And thus, I train the habit of actually doing things. Figuring out the right thing to do is also a vital skill, but can come second. Don’t let the perfect be the enemy of the good.