What’s an orgasm feel like?

So I masturbate probably a few times a day but I never know when I’m having an orgasm or if I’m even having one!? 😩 sometimes when I use a toy, I’ll cum. When I cum, does it mean I’ve had an orgasm? What’s it supposed to feel like? And when I rub my clit, there are certain times that make my body just want to twist and turn and it feels really good, to the point that I must take a break before starting again. Someone please help!!! I want to learn more about pleasing myself and my body before I actually have sex with my boyfriend.