You could listen to some Podcasts or similar things.
I listened to The Future of Sex Podcast. They have an episode on "Orgasms and the Stigma of Male Sex Toys" from December, 9th, 2020. It also brushes on prostate play. I don't really know if there are better Podcasts or educational material in english, as this is not my native language.
Amazon sells those, too. But there are probably cheaper (specialized) stores. You could have a look at the reviews, though.
Edit: Glad you're getting out of that abstinence-only thing. Sex is an important part of being human. And abstinence is really a bad approach.
Sticking things into your butt isn't something beginners usually do, though. You do you. Take it slow and use plenty of lube. I'm not sure if those toys are made so you can sit down.