Welcome and I'm sorry for everything you've been through. There are several other women on this board diagnosed with DOR - I am one of them. We don't have all the answers either, but we're here for you. And more importantly, there are DOR women on Pregnant after IF and PGAL so there is hope!
Just because you don't have a partner does not mean you can't and shouldn't have a baby. Many women do. Raising a child on your own is not easy, but it sounds like it's a commitment you are willing to make.