Other than the obvious problem of faster than light travel, there is a significant problem of both time and distance.
That is, of the about 4.5 billion year life of Earth so far, people have been intelligent for about 100,000 years and technological for about 200 years. The universe itself is about 13.6 billion years. So we are really a flash in the pan.
This means that we need to mutually locate another such flash in the pan intelligent species, unless intelligent species, as species, tend to be very long lived. Otherwise, unless intelligent species create other intelligent species that can outlive them, it is unlikely that we would ever cross each other’s paths before one or the other is extinct.
I suspect that a truely intelligent species would recognize the need to leave the nest (home planet) so they would get on that horse and push the boundries of technology to do so.
If they want to do so with faster than light travel they would have to take the relativity hit and realize that it’s a one way trip. On the other hand, they could know things about space and shortcuts through it that we haven’t even got an inkling about.
In any case it’s all interesting and thought provoking stuff.