Are you sure you would thrive without a job long term? I know it's very easy to feel that way when you're working because your pay is proof that you're doing something valuable, the requirement to do your job even when you don't feel like it ensures you don't fall into a spiral of laziness, and you don't have to face the inevitably worse reality of actually doing those things you want instead of just imagining them. What direction would you even go in and what force would continue to drive you even after your kids have grown up and there's nothing of value you can do for another human? Personal improvement in what direction? Be better at coping without external validation?

There are sayings like "If you want something done, ask a busy person to do it" and "success breeds success". I have plenty of life experience that appears to confirm these in myself and others I know.