eming1
One fact I found really interesting is that fear is embedded in your brain & body. A fear response is triggered immediately (30ms) even decades after the original incident. Learning to identify and resolve causes of fear can help you lower the barrier to doing your tasks. If we consider procrastination as a barrier preventing you from doing something, you can either up your will power, lower the barrier, or a combination of both. Good luck on your journey!
Personally, I'm currently focused on developing my self-awareness by attending therapy, journaling on childhood issues and current emotional reactions, and meditating. I found even as an "adult" in a "real job" I have trouble asking for help, writing clear documentation, feeling confident to take on larger roles and digging into self-awareness has helped that a lot. See @healthygamer_gg on twitch if you're interested.
While doing all this, I realized what lead me to software was being good at the math and science in school, and this is a well payable stable job. Growing up somewhat poor, this seemed great and I loved the praise of doing good job and getting rewarded with bonuses/promotions. I began to see I depended on these to feel good but as I realize this, I want to get more out of life. And so, I find myself in a similar position to you, not really knowing what to do.
So, I suggest this: reflect on what you value, try to create and put something out there (maybe make a 5 min film on a recent local policy and how it affects your local community), develop skills and have fun, ask yourself who are and and why are you this way; who do you want to be? HBR's "Working Identity" posits that you can't know only by introspection, you have to also just try things out.
I'll finish off with this: "Know thyself" -Seneca. Perhaps there's no manual because the act of looking is the task required. That said, I find philosophy and psychology to be the closest proxy :P