Think of it as a process, not something you have to get perfect the first time. Just get on the bike and go!

So much of the learning is in the doing. You won't learn until you spend time on a bike: the type/size of bike that suits you; what kind of saddle you find comfortable; whether you want lots of chamois or very little; etc. etc.

Time on the bike will lead you to the questions that will be important to your enjoyment of the sport.

Start with the bare essentials and work from there: comfy clothes (can be from other sports), helmet, gloves, water, snack bar, emergency cash, ID, cell phone. Maybe some eye protection if you like. And don't sweat it if you leave something behind. If you miss something, you'll definitely remember it the next time.

Have fun!