This. I always wonder why discussions about the search for alien civilizations don't take the massive timescale more into consideration. Say you're watching a summary of our universe compressed to a hundred years. Each time a civilization pops up, it might just hold on long enough to last a nanosecond. We're just living that in that blip of a time.

Interstellar travel is definitely possible. The only question is how long the trips take. You can build nuclear pulse propulsion vessels fairly easily that can reach a few percent of the speed of light. Those things can cross the Milky Way in less than ten million years.