Don’t be sorry! But if you haven’t checked out the wiki guide please do, you’re not alone in all these questions and it’s a lot to learn 😊 https://www.reddit.com/r/Rollerskating/wiki/index?utm_source=share&utm_medium=ios_app&utm_name=iossmf

And personally I bought this helmet on Amazon and it’s done me well for the past 2 years OutdoorMaster Skateboard Helmet -... https://www.amazon.com/dp/B07CWM1MSJ?ref=ppx_pop_mob_ap_share