People will refer you. It also helps if you have freelancing friends - they might need help with something. Or you might need help with something and they might need work. Karma is a real thing. Make sure your home office is one you can work in for hours at a time.
Comfortable furniture helps.
Also, make sure you go to the dentist and whatnot while you still have benefits. People are usually at the point of desperation when they get around to hiring freelancers. Use this to your advantage. Don't let your personal insecurities get the best of you. Clients smell fear a mile away and will lowball you.