Online non-scammy economics courses (with some sort of certification)?

Hi guys! So, just in short my gf would like to learn a bit about trading, import/export etc, as a way to change career path. She’s trying to figure out what kind of course to do. Since she’s working, it would need to be an online course, but I’m not sure which ones are…not so scammy? Maybe, with a recognized not-made-up...