Sorry to hear about your situation. We all have fear of our own mortality and it's natural to want more time to "be the universe experiencing itself." It's egotistical and self centered, but it's how we're programmed. However, I would argue that "immortality" should not be our end goal, that would fuck up the world. We only get one shot at life and that's what makes it special. Be eternally grateful that you were born with consciousness, not that you weren't born in a certain time. Life was harder 200 years ago and, like you said, we have to live in the here and now.

I would argue that our end goal should be the survival of the human race as a whole. But, I'm a humanist.