I'm going to go against the grain here to be devil's advocate. If you pray, i would pray about it. 53 is not too old to potentially safely have a baby with donor eggs. I had my first and only baby at 45 with IVF and my own eggs. Split with my husband when my daughter was 1. I wouldn't change it for the world. Did you hear about the woman in Britain who had a child naturallly at 59? She was on HRT though. Yes extremely rare but she and her husband were delighted.
But also - pregnancy is tough on your body. Sleep deprivation I find is a nightmare for any reason now that I'm over 50. It would be hard work. However - you don't have kids and you may well be wanting to give this one shot.... so that you know you tried... and if you really want a child it could be worth it. The risk of course is that you could have the child and then get cancer shortly after - I think that happened to a woman in Italy who had twins through IVF aged about 60... but her family took the twins in after she passed. Mind you, any of us could get hit by a bus tomorrow. If you are on the whole fit and healthy (as far as you know) and have longevity in your family genes...if there's low family history of cancer and dementia and so on.... if you actively do things to keep your body youthful like avoid alcohol and sugar, lift weights, do plenty of exercise and so on... even then there are no guarantees of course. If you have faith, the prayer that always works for me when making a decision whether big or little is something like this .. "Father God" (I'm Christian so that's how I pray) "please open the door to me having a baby this was if it is right for me... please close the door on it if it is not the right choice for me or for a potential child ". Look, people will always judge and say no way should someone be a mother at that age but I can't judge if it's right for you or not. You could live healthily into your 90s and have a beautiful relationship with your child. Or you could have a decline in health and leave your child too soon. You'd definitely need to take HRT I would say to try and remain a bit youthful (I am on it and apart from the fact I take it to alleviate symptoms, I also just didn't want to be a crabbed, grumpy mother to my little one who is only 5 now as I'm turning 51)
Look only you know how youthful you feel and if you think you have potentially a good innings left and a good life to offer a child.
I prayed a lot and believed I was going to have a chilld, I had infertility for 8 or 9 years I think it was (it was my husband's sperm that were apparently the problem). The consultant I had when I was 42 would not put me forward for IVF at all, she wanted me to do it with donor eggs. I wanted to try with my own eggs. She wouldn't let me and put me on a waiting list for IUI as it was free on NHS. I didn't get it until I was 44! And it didn't work, after 4 rounds I said "Ok can I have IVF with my own eggs now" and she was horrified and said it would never work. Donor eggs... yes, no problem, quite a good success rate. She told me I had a 1% chance with my own eggs and wouldn't put me forward for it. I went straight out and rang another consultant and I got put on IVF ONE MONTH before my 45th birthday (that was the absolute cut off for doing it) and he told me this has a 97% failure rate - it worked first go and I had a beautiful healthy girl. From what I believe, with donor eggs and donor sperm it is not as risky for birth defects and miscarriages as the eggs and sperm are younger etc... of course the one thing that won't be younger is you! But you know what, it was so worth it. If I was in love and married to someone now and we by some absolute miracle got pregnant, I would totally do it. I know I would be so knackered (I had gestational diabetes and hypothyroidism during my pregnancy!) but it would be worth it. So... let it be between you and God (if you believe in God ). I admire people for going ahead. I know people who sadly never had a baby due to waiting for the right man and he never came along. But... lots of others like myself had the baby with someone who did not turn out to be a good partner at all... So looking back, I think younger women should totally freeze some eggs for the future, but none of us were thinking like that at the time...
Anyhow the other concern that you have of course is that you have no family back up. That is hard. A lot of the celebs who have babies in their 50s with donor eggs also have plenty of money for a nanny and all that... so anyway you have a lot to think about, good luck with your decision but if you go for it I would certainly not judge you and in fact I would admire that you've thought that you only have one life and you want to go for it. BUt ... it would be hard, very hard, on your tiredness, body, etc. If you also had bad menopausal symptoms it would genuinely be a nightmare. I am so much wiser now than when younger whcih is good while raising a child.. but I ALSO am grumpier with less patience, and a lot of that is due to energy levels and an underlying autoimmune thyroid prob that has came to light since perimenopause. So yeah... there are a lot of good reasons NOT to do it too. BUt I wanted to show you it isn't necessarily all doom and gloom. Good luck, whatever you decide. (Also I don't know the story about adopting or how that works so I didn't mention that as an alternative, but it could possibly be?)