I’m scared

My first long roadtrip by myself. I recently graduated college and have wanted to live the “nomad life” for at least a short time so decided now would be a good time. I plan on leaving in a couple days but I have no set date or time. I want to make it to California from Tennessee in about it a week or so. My parents have been putting not so great thoughts in my head for different reasons. My mom is worried about my dying and my dad thinks I’m stupid for blowing all my money to travel.

Any advice on things to do or see on the way there? Or tips for living out of your car for a first timer?