Ahoy and welcome. Dive in, it's great fun, although it will eat every penny of your disposable income (plus all you can borrow).
It's absolutely fine to book a rental package and rock up solo to any site - it's a really welcoming hobby, and people are generally very happy to show you the ropes. All you need is to dress for the terrain (footwear) and weather (waterproofs/layers if you're outdoors). You don't need any of your own gear, camo, or even eyepro, although your own eye/face protection might be preferable to a rental mesh mask.
Do you have a site in mind to try?