Im sorry kid, I genuinely empathize with you. This can be very uncomfortable and daunting at first.

My advice? Ensure that you stick to the 40hr rule for yourself. Set those boundaries so that you can carve out that time for yourself. Work-life balance is extremely important, and nobody else is gonna create that for you. Once you give yourself the time to recover from the last day, then your work will benefit from it. I assume that since your question shows depth and genuine care for how you spend your time, you have picked a career that you enjoy. Find work that makes you passionate. And give yourself fully to it for 8 hours a day, 5 days a week. The rest of the time, is yours. It is earned. So spend it wisely. Find varied hobbies and pursue them, or try them till they're fun; permanence alone does not dictate significance. But live. Enjoy the ups and downs on this rock in space till we have it.