Hope you know a Chinese language then. The PRNA never shut it's borders to Chinese immigration, and with the multiple civil wars the Chinese had there's been a lot of refugees moving in.
The issue with the Atlantic is the widest bit is ~30 degrees north, with is where desert belts tend to form. Ad to that the otl East Coast being a cold water current zone and it's set up to be nearer to North Africa than anything really.
Up north the issue is more altitude. Too much rain is lost on the otl Continental Slope, so the Abyssal plateau is rather dry. That's an issue for a lot of the planet.