You sorta have to make the time.
I know how it is. I work 8 hour shifts mon-fri and I try to make it work.
Some weeks I get stuff done.
Some weeks after work I don't work on anything.
Those are usually weeks where I had a lot done the previous week.
Like a break from burning out on the project.
Just get motivated. If you don't have fun doing it, it more of a chore and not a hobby.