It is going to happen that way or it will not happen at all.
Success is NOT 8 hour days, 5 days a week. It takes plenty of time to get started plus the fact that in the USA small individuals are crushed by big tech. Not sure how it is in your country, we face tremendous headwinds. With strong headwinds you will need to spend more time at starting your business.
I had to work full time when going to college, that prepared me for boot strapping 2 companies. It can be done, just keep your chin up and don’t let big tech bullies push you around.