FIRST TIME FINGERING

Me and my boyfriend have been dating over a year now and have never done anything super sexual. Very heated making out, he’s rubbed my v but only with my pants on (I’ve done the same to him and his dick), and that’s about all we’ve done. We have talked about him fingering me a lot lately. And we are both totally fine to get into that.

So any tips or how to make sure neither of us get an infection of any kind?