How do you actually find time to build a business when you're already working multiple jobs? (24F)

I currently juggle a few different jobs just to cover bills and on top of that I'm trying to build my own business, but obviously by the time I'm done with work there's barely any energy left to actually sit down and dedicate a few hours to it.

I'm also trying to maintain some kind of normal life on the side, going to the gym is a non negotiable to me, also seeing my friends and basically having a life lol. Something always ends up getting sacrificed and lately it feels like it's the business itself which is obviously the opposite of what I want.

I know the generic advice is "wake up earlier" or "just be disciplined" but I feel like that only gets you so far when your schedule is already maxed out. I think what I actually need is like a better system?

For the people who built a business while still working other jobs, how did you structure your time realistically? Did you have to cut something out temporarily on purpose? How did you decide what could wait and what couldn't? Genuinely trying to figure out how to start making real progress, any insight from people who've actually been through this stage would help a lot!