To get to the point of being able to cruise around everywhere comfortably is a lot easier on a skateboard than learning how to bike imo. You don't have to keep up momentum, you just have to watch out for the occasional big crack in the sidewalk. You don't have to learn how to brake that well, either, if you aren't bombing hills. I kinda just start pushing slower with my foot and that brakes me fine enough, rather than do the shoe destroying sliding foot brake.

Tricks are another animal, but just cruising around can be learned in an afternoon in a parking lot. I picked it up as an adult. I mean there are bulldogs who can skate if you need motivation.