Spiritual sex?

So I used to have deep discomfort with my sexuality for a lot of reasons, and that seems to be getting better now. I have also deepened my spiritual practice and that has been good for me in many ways, so why not sex? I would love to ditch residual shame and any unhealthy habits in that area.
Problem: I have no idea where to start. Any advice I've found has been vague and contradictory, and the best stuff is for couples, which is quite unhelpful for single old me. Any thoughts/ideas would be much appreciated.