Immigration and education level

[MNomadic]

I can't speak for all of the countries but I know majoring in CS/IT or related fields would be highly desirable for US immigration. Getting a master's of course helps your chances further for landing an H1B visa. Online shouldn't matter as long as it's properly accredited obviously, and being that your undergrad is planned for a US, RA school I think you'd be off to a good start.

As far as US "openness" to foreigners are talking about legally or culturally? If you're getting CS degrees and planning to go into a CS field, you'd have a "relatively" high chance of getting in vs some other fields. As far a culturally, you'd likely be perfectly fine as well, especially if you move to an urban tech-hub type place(where a lot of CS jobs would be), since they're generally more diverse, open, liberal, etc.