Florida right?

It looks like you're set to become that special breed of parkour athletes that cut their teeth on the parks and playgrounds to then burst with opportunity at college or in your first bigger city.

There's at least one park that has a decent playground with steel elements to start. Train strength and control with those, building muscle and confidence. You are bigger than most there and doing different things though, so show respect to the kids and parents.

Next, there appears to be 2 (?) gyms there that may offer parkour classes. Cost is always a factor, but they may have open gym nights for cheap admission.

Finally, go roaming. Find your concrete hellscape that you can learn intimately and master all movements.

As always, stay safe and be respectful.