Advice from TTC couples please

So, hubs and I have been TTC for over two years now. I just got diagnosed with PCOS, so we're really cracking down on "doing detail work" now (tracking everything on Glow everyday, taking meds, getting healthier, stocking up on ovulation and pregnancy tests from Amazon, bbt tracking soon, you get it). The biggest issue besides my health however turns out to be sex. Hubs has low testosterone and gets monthly shots for it, but he still has a really low libido. Both of us being really overweight doesn't help. I'm 21 going on 22, so libido is definitely not an issue for me. There's an age difference, so he's been wanting to settle down to have a family since he was my age and now he's 33 1/2. He's really flirty and sweet with me and still finds me attractive even with my weight, so it's not an attraction issue. We both are on board that we need to BD more, but it's difficult when he's almost never in the mood. Anyone have any suggestions or prior experience?