Due to the limitations of travel greater than the speed of light and the short relative life span of humans inter galactic travel is the stuff of science fiction and fantasy.
It’s all science fiction until someone figures out how to do it the first time...
My grandfather was born in 1906, and died in 1992. He had a lifelong interest in all things technological, and would often sit and describe to us grandkids how the America of the late 20th century was like something out of Buck Rogers, compared to the world he was born into.
Try not to be short-sighted. More technological wonders are to come, than we can easily imagine.
“Due to the limitations of travel greater than the speed of light and the short relative life span of humans inter galactic travel is the stuff of science fiction and fantasy.”
Sub-light speed intra-galactic colonization is possible.