OP, at your age I and my friends were derbing all over the deserts of SoCal in 2wd mini trucks which we'd put 3-4" body lifts on using plumbing pipe segments and hardware store bolts. We learned all about speed vs momentum, and traction and weight distribution, the hard way. We got stuck a lot but we also managed to go a lot of places neophyte in 4wd vehicles failed. So I say to you don't worry about 'basic' and find some friends and at least one other vehicle and get out there and get stuck. Enjoy yourself. You'll be able to go far more places than you'd believe today.
Find a vehicle with 4wd, find a vehicle with potential for future mods, but don't worry about those mods today. Instead spend the limited money on GOING PLACES. Gas, beer and hot dogs, and a good shovel and rope / strap are all you need. eta I learned to cook a mean cheap steak in a shovel back then, too. And a bulk pack of hot dogs for dinner were 'breakfast sausages' in the morning.
Between this bunch we had 2 Chevy Luvs, a Datsun p/u, A Dodge D50, a Baja Bug, a couple Toyota SR5s and a Jeep. The Jeep was the only one with 4wd. And a ton of dirt bikes and ATCs. The whole bunch weren't worth the purchase price of ONE of these show queens you see in some of these pages. We roamed far and wide on the same dirt you'll be heading into and we had SO much fun. I'm the idiot with his hat on sideways. This pic was taken on the back side of Little Rock Dam, over 30yrs ago. Half the places we used to go are closed now, or built over.
Beyond the vehicle basics, pay more attention to the mechanical condition of the vehicle, than the cosmetics. And try to find something with tires that are good enough as is. You don't want to be spending a grand on tires and wheels right off the bat.