I've been working on https://github.com/jalal246/dflex along with a paid job. But I made it clear that it's an open-source project. maybe it's different if you are not working on open source. About time management, I can't really tell. Spent the last year working all day, 24/7. Currently, I am experiencing burn out with another side effect including insomnia. So I recommend having a balanced life. Don't push yourself too much and play the long terms.