how to have an orgasm?

I’m wondering if anyone has any tips on figuring out what you like and how to achieve orgasm because I’ve heard like a million times you have to know what you like and what to do before someone else can help you. Me and my boyfriend have been together for two years and we’ve had good sex but I don’t think I’ve ever had an orgasm before. I have a dilator that my gynecologist gave me, but it’s not a dildo. So idk if I could use that to help me. Thank you!