Devs with young kids: how the hell do you do it?

I am a foster parent for my cousin who is 4 months old and I don’t know how in the fuck to make this work. How do you do it? How do you balance code and kid?

For reference I work full time at a tech support place, I go to school full time, and I’m trying to pivot into software development, which means any free time is spent coding/studying code/building a portfolio. Problem is I don’t have free time because of the baby. How in the hell do people do this.