Sit down and take stock of what you want.... Whatever said and done command is... COMMAND!
You will be able to get command in a foreign airline but it's usually a bit more difficult... Not because you aren't technically sound or aren't a good pilot.. Simply because there might be a issue of "local pilots"
Its very difficult to predict an airlines future. You can get a 320/737 job after a few years in command... Again, you've to sit down and take stock of what you want to do...
Ending on a thought, if something were to happen to your airline... Will it be easy for you to get another job as a 320 FO or Emb145 captain?