Eternal life would be sort of cool but I dispute your proposition that more people automatically make more progress faster. More people increases competition which incentivizes some kinds of progress but arguably retards others - consider our lamentable record of environmental destruction.
I don't think your aspirations are morally wrong in any way but your thesis seems unproven and I could just as easily argue that your efforts are primarily motivated by your own fear of death. Having had far more near-death experiences than most people I've met. I'm broadly OK with it because my experiences suggest to me that there's a lot more to consciousness than the everyday world, and that if and insofar as life has a purpose, it may be to reach some higher level of knowledge within finite constraints. I sometimes consider that life-as-we-know-it might be like some elaborated version of a book a film or a game (similar to but not the same as Bostrom's simulation argument).
Would you enjoy a book or a movie that never ended? Obviously there's a market for such things based on the continued existence of daytime TV soap operas, but nobody seems to think those shows have much cultural value.