It is mechanism of genes? Of course we are different species and you cant 1:1 transfer it to mammals but you can tweak our biology into it. Check dr Levin work on regeneration in species that dont posses ability to regenerate limbs. By this I meant it is possible because it occurs in nature.

Nature choose one of two ways, either producing offspring or immortality and I absolutly prefer immortality. We can do it, it is not against biology or physics so its just a matter of time.

Work? Study? Watch? Play video games? Read? Exercise? I dont really need much. There will always be new tasks, new things to study, new series to watch, new games to beat, new books to read and keeping in shape is always going. Absolutly want to do it for as long as I want. If I decide it is time for me and Im already bored then always you can go euthanasia.