Since you're a dude, you'll probably do better hitching alone.
Where in FL are you? Get to an on-ramp at I-95 or I-75 with a large, clear, bold sign saying the next nearest city along the route you wanna go.
Take some water, some food, sleeping bag, maybe an umbrella or tarp, and a road atlas.
Go for it now, solo; don't wait for someone who'll just be a liability or try to use you.
Good luck!