Reddit mentions of Future You: How you might live to the end of the universe.

Kudos for realizing some of the often missed implications of rejuvenation, like "till death do us part" -type marriages having an entirely different meaning with eternal youth.

But I think you could skip a few years of constant thinking and deliberating by just reading this book: https://www.amazon.com/dp/B06XP5Z3W4

It literally takes us from todays society through every issue we are faced with now and until the very end of the universe, and then some. Without needing things that for various reasons simply won't happen (like massive national space agency projects for space settlement, or global cooperation to deal with climate change).

I have to point out that it is my book, I would link to another book if there actually existed a second such book. I wouldn't even have bothered to write this one if there was a book like it already. But I got so annoyed by all the fantasies about generation ships and floating space farms, when some Finns are converting air and electricity into proteins https://solarfoods.fi/ and aging simply won't exist by the time anyone can set sail to another solar system thanks to http://www.sens.org/ and others who follow their strategy. So I just had to write it, because every single piece of science fiction and future-oriented non-fiction was completely and utterly unaware of things such as this.