Sex positions and spicing it up

hello there! So my Fiancé and I have not had bedroom time in a while. been really busy and have disconnected a bit. he really wants to get into anal and I'm okay with it. But we have tried a few times and it's so painful! I need some good tips on position and how to make it less painful! Also, I could use just some positions and tips on spicing it up. Last, I seem to have a higher sex drive than him. So I need some help on getting him in the mood! TIA!