Lastx - your reading, while commendable, has lead you to a wrong conclusion. The number of expats is a trivial number compared to the number that stay in the U.S. And frequently that path was chosen, or became the best option, because it didn’t work out, at least at the time they left, in the U.S.
Ten to 15 years ago, while the U.S. airline business was struggling and the ME 3 were growing, several guys that I know went to the ME 3. They’ve all returned as the U.S. job market snapped back.
I’d focus on getting to a regional airline ASAP. With the new regulations you could get hired by 20-22. AA WO would give you s job st AA between 26-30. Less than 50 pilots under 30 at AA so you’d have a fantastic career. UA and DL would have similar advancement.
Good luck.