Ask Lemmy

One thing I would definitely do is let her know that you like her, you enjoyed it and you want to do it again, and that you were just nervous. She's probably equally as nervous about how you're feeling as you are about how she's feeling.

Also, most guys don't tell women that they're beautiful/pretty/etc, which really surprised me when I learned that. It also surprised me how good it felt to hear it back. It makes a big difference to let your partner know what you like about them, and although it's probably not great that we focus so much on women's appearance as a proxy for their self worth, it's still a nice thing to say. I say this assuming you do think she's hot - I find when I've got a crush on someone they seem to glow.

Now, here's some practical, slightly graphic, slightly clinical advice that I wish I had when I first started out:

Technique is something you can research, but it's also unique to each person and requires communicating. Consistent stimulation of the clitoris will generally lead to orgasm. Not too hard, and you should also avoid the temptation to just go ham, you're not trying to erase it. If you're not in a rush, she'll sense that and it will help her relax too, which is important for being able to enjoy the experience. Let her ask you for more intensity if she wants it, and if you're making her feel good she probably will. Taking it slower is a good way to get your partner to realise they want more and communicate it, which is a great opportunity for expressing enthusiastic consent, and it's sexy as hell. Make sure her clit is kept wet with something - spit, her juices, lube if you've got it.

A comfortable, intimate position to try it from is lying side by side, one arm under her head and the other one doing the work. You can interact a lot, kiss and pay attention to her responses like that. It can also be worth getting down close to her bits and looking at what's going on there. Plus the tongue is a good tool like others have mentioned, and light suction can be nice especially because it draws blood to the surface and makes the skin more sensitive.

Some clit owners like more direct, under the hood, some prefer over the hood, some prefer more left or right side of the clit. It's also worth experimenting with inside stimulation, and learning about where the gspot is. It's basically a way to stimulate the same clitoral nerves but from the other side, inside the vagina. Also all around the entrance and nearby are also worth giving attention, it's not all about the happy button (although it largely is). If you can't tell what she likes, ask.

This sort of thing, if you learn it, will help you be a good lover, and there's nothing better for your confidence than making someone cum. Another thing that will help you both enjoy it is learning what feels good for you and being able to communicate it to her. I wish you much good sex.

Edit: one last thing is, clean your hands, your junk and your ass. Even if it means getting some baby wipes and cleaning up in the bathroom before you start, it's worth it. Vagina owners are way more conscious about infections because they've got a giant vulnerable membrane down there. It makes a big difference if they can tell you're clean, and a lot of penis owners just never learn this.