Fingering

So I’ve tried masterbating before and I’ve never been able to make myself orgasm. Not even really get close. My boyfriend has rubbed my vagina through my pants while making out a number of times, and that definitely gets me a lot closer than anything I’ve been able to do by myself. We’ve been talking about him fingering me sometime soon and I’m really excited about it but I’m worried I’m not going to orgasm and it’s just gonna be disappointing for both of us. Any advice?