Stipulations:
- You cannot die and are immune to disease
- You cannot alter the future such that you change the world from your point of origin. i.e. You cannot become so famous that future people recognize you as immortal.
- If you vary the timeline too much you will cease to exist.
I move to a country where you can have quality of life at very cheap costs. One of the larger Greek islands maybe. I try to live healthy even despite the “immune” feature because life is better then.
Make a fortune of course from knowing the future but keep it secret. Remain unknown to the greater public.
Buy a little house and a patch of land to grow my vegetables. Learn languages. Make friends.
Try to do ‘good things’ with the money (find out what good things are…).