Anybody help with time management?

So I currently have a Mon-Fri job, I work from 6:30am-3pm. I only live 2 minutes away from my work place. I have 3 kids and have a small business I run at home. I want to make time so I can start working out again, teach my 5yo, have time for my business, have time with the kids, and have time to look into possibly starting online college. I'm unsure of how to manage all of this.

I'm married but my husband works a night shift, he gets off at 6:15am. None of our kids are in daycare or school. We do not want them in daycare. My husband does most of his sleeping after I get off work, he'll go straight to bed when he gets home, sleep until the kids wake him, get them breakfast made and sit up with them, come nap time, he puts them down for one and goes back to bed. I end their nap when I get home.

Any suggestions? This is all I can think of right now.