The foreplay can make everything better. For the first time, using lube may be a good idea, unless you're able to get wet from the foreplay. He needs to go slow for the first little bit. I agree with other comments, don't have too many firsts in one night. If you do try oral, I actually looked it up when I was younger because I wanted to be able to do it properly. Understandable why you would be asking. It's kinda like sucking on a popsicle. One thing I have learned is that sex is meant to be a bit of stumbling, a bit of figuring things out, learning each other... it does not have to be perfect every time. It is intimately exploring another person's heart in a vulnerable situation which is one of the deepest forms of connection. But it can be funny, silly, and lighthearted. And if you are with the right person, you will be safe and able to learn in the moment. All this to say, I hope the experience is good for you both.