on bitmaps and scaling

[ChaosChronicler]

So I have a question for those that do art assets. I would like to try my hand at digital art again and what better way to practice by making simple illustrations for a game I like. That and wanting to create my own mods.

Thing is I don't have a program to do vector imaging, instead I have Clip Studio Paint which uses bitmaping. Past experience I know I can't scale up without using a larger resolution, but don't really know what happens if I scale down.

So I'm just wondering if it's a good idea to scale down images (to something like 128x128) or if I should just draw at that scale?