Oh Marlene, how much I feel your words!
I've experienced it - all:
full time job, three small kids, side gigs to put the bread on the table (living in Serbia where an average salary is not enough to survive)... experienced burnout and learnt my lesson.
Nowadays, I have a full time job, and have to keep it so I can keep my Australian visa, working on my small side hustle Marketing Fary at my own pace and enjoy the process. Finger cross I can manage itm, and happy to cheer for you along your road.