My now DH had phimosis when we met (he was 32 apparently he'd had it since his mid 20s) - he could be stimulated to orgasm manually (smaller strokes at foreskin height, careful not to tug back too hard and cause the tightness around his foreskin to pull).
Like Ineedmore.... and Obliviated oral sex was a bit touch and go, the stale urine (and smegma) thing is a thing, but luckily DH was able to (more uncomfortably than painfully) retract his foreskin in the shower to give it a good tentative clean, so we just had to plan ahead (I was quite direct about this, it sounds like your relationship is not quite settled enough for that level of directness).
I also learned to be a better 'receiver' of manual stimulation (how nicely put!) as there is a lot of pleasure (for him) to be had out of pleasuring others.
About a year into our relationship he had a minor surgery to fix the phimosis - a little snip to loosen the foreskin under local anaesthetic, apparently it was noninvasive, and only uncomfortable (itchy and a bit achy) as it healed. It healed within six weeks or so, and we were able to have full, penetrative sex with climax after that.
His foreskin and 'helmet' (is that what we're calling it.... I guess better than 'bellend' but not as accurate as 'glans') remained super-sensitive (almost painful) for several months so we had to go-easy (plenty of lube, gentle near the top) - but slowly become accustomed to getting touched.
It did take a while for our sex life to fall into an even keel - having had very little pre-op, none for over a month post-op and the it being sensitive for a few months after that - but all-in-all, if he's a keeper, these things are inconsequential vs. the love and care we have in our relationship.