Ffm threesome tips??

I'm a girl. Me and my best friend and her bf want to have a threesome. Me and her are both bi and all three of us really want to do it. We've all agreed that we're not gonna take the chance of getting pregnant so he's not actually going to put his dick in us you could say. Just oral stuff. I need tips please and none that say "don't do it! feelings will get hurt!" because we are all wanting to and if feelings get hurt, it'll be for a good reason. Please give me good tips on the best way to please them etc.! Please and thank you! Best gets 10 points!!