I think a lot of us shy away from love scenes at first because we don’t want them to sound/read badly, like “Wow, do she even know what she’s doing?” And if we write a really steamy one, how does that reflect on us? But I think you just need to try it.
Since I started out writing fan fiction, I progressed really slow, a little kissing and petting and then when i got brave I tried a very tame sex scene first. And then as i became more comfortable with it, i had them having sex against the wall, on the kitchen table, breaking stuff, oral and such – the ‘c’ word flying all over the place. Sometimes, i have to admit, i still cringe at that word. But its seems to be the word of choice in more contemporary novels. Sometimes it fits especially from the male point of view.
What i found was that i really like to write sex scenes from the male POV, don’t know why, but i think it feels more intimate, like his soul is bare. I agree with @lisahartjes – if you sort of choreograph it, like a movie scene it does help because you get the visual logistics and then you can add the emotional content, if needed. How does it feel when he does that? What do her eyes look like when he does this? etc…