I keep hearing it repeated in sapphic circles that scissoring is a myth; pretty sure it's not 😁
I literally thought scissoring was not a real thing people did until my girlfriend just climbed on top of me and started doing it. And then I ate my words and it was super super great, would recommend.
Positioning is key. It's not like anything you'll see in porn. The way we do it, person 1 lies down face up with her legs spread (like someone's about to eat you out) and person 2 positions her clit over 1's clit, usually positioned diagonally over 1 (IE with one leg on the outside of 1's leg, one leg between 1's legs). Then 2 moves her hips to rub her clit against 1's and 1 press her hips up into 2. But really any position where you can get your clits touching and neither of you are uncomfortable, you're probably going to have a good time.
Oh also, fun thing about scissoring, if you're a multiple orgasm kind of person (like me) scissoring is suuuper fun because the sensation is more subtle and you can just cum like, forever (idk about y'all but I can at least). Orgasm 1 usually isn't as intense for me but by the time I'm hitting orgasm 4 or 5, ohhhhhhhhmygd it's amazing.
Oh and this position is super fun with my girl's clit piercing, feels real great.
The thing that's usually stopped me has been simply the amount of space in the bed ... plus other practical limitations like if it's winter how do you stay wrapped up and do it, etc