I only have one life', so time for only few choices, ...

If I know now, I could live forever, I would take a deep breath of relief, and I will reset my mindset, my views and my aims.

I would probably prepare longer and thoroughly and plan more for ongoing projects.

I would definitely read, listen, search and explore not just 'to know' but 'to become'.

I wouldn't probably worry about 'living life to the full' because risking it will not be worth having.

Or that's probably just a fairy tale idea of what's about to live forever.