I’ve done a bunch of them. I say do the Jackie Robinson one first for the good equipment rewards. Then do the USA map. Sure you will get better players down the lune but you get so many free packs from USA map it will help you improve your team.
Then do the rest of the maps in whatever order you like. I did one of the team affinity maps for the region I want to complete first then worked on a couple of the other easier maps.
The good news is there isn’t a bad choice just do whatever maps you want honestly.