Hi Phil, kudos to your daughter for pushing you in the right direction. It will help to feel there are people that totally 'get you' and I think everyone on here can do that, either from the perspective of a survivor, or from a carer/relative.
My stroke was 2016. I suffered with all the things you mention, as well as physical disability. The vision improved slowly, the fatigue is still constant but there are slow and tiny improvements, even after 5 years.
Depression can be helped with meds, I was always anti anti depressants, but I did try and they did help, but not overnight.
Loneliness is even more difficult after stroke. This is the 1st step to making new connections and there are other ways to reach out on the internet......throw yourself into it and see what happens. I joined a dating site, explained my issues and struggles and see who responds. Made a couple of friends but not the elusive 'one', but got to keep hoping.
I did return to work, but that was after 18 months and only to part time and working from home, but I couldnt cope and have just taken ill health retirement.
I hope you take some hope and strength from the responses you have already got on here. Its not like the old life, but it can be a different life. Its not all positive, but there can still be positives to come, but you need to instigate the green shoots of recovery from within.
Best wishes and good luck.