Out positions are limited and I need an Orgasm

My boyfriend and I have been together about 6 months, I was a virgin before meeting him and I love sex, we don't do it enough (mostly because he has a lot of back issues and chronic pain we are working through) but I feel like we haven't gotten a good groove of sex yet. it's been getting better and I feel a lot better with penetration than when we first started having sex a few months ago.

My question is, do you have any recommendations of positions or tips to orgasm? he's gotten me close fingering me but I feel like maybe there's something we haven't tried, it might also be his back issues, I'm not super sure. Because he's in so much pain from what he's been through plus his labor intensive job we are limited in positions that don't hurt his back :/

anything is helpful!