I had an ovary removed at age 38 due to an overgrown endometrial cyst. I got married a year later. I ended up having two children, one at 41 and one at 44, both natural conceptions. I wouldn’t say it was easy (we tried just about every month we could in there), but we did it

.
Things I would recommend:
Read TCOYF.
Do acupuncture with someone who specializes in fertility. I thought it was woowoo at first. It’s not, it really changed my cycle and majorly reduced my monthly cramps which were presumably from the endometriosis.
Take supplements. I tried so much. Royal jelly, amino acids, vitamin D (effects ovarian function), resveratrol, pycnogonal (big one for endometriosis) and others I’ve forgotten. There are books, do some reading.
Track your cm. I think the ovulation predictors are off. By the time they show ovulation, you should have been having sex a couple of days prior already. Watch your cm and learn about your own body.
Your body will adjust to the loss of the ovary. You may have some slight hot flashes (I had “warm flashes” - I learned about real hot flashes when I had the second ovary out!) and your cycle may shift. Take care of your body, learn what you can, have sec at the right times. I wish you all the luck in the world. I had some dark moments while we were trying, but I’m very grateful it worked out for me in the end. Hugs.