FAA ATP is “good enough” for most of the world.
Many countries will either validate or convert ANY ICAO license, with minimum fuss. I think EASA is the exception.
Middle East will validate/convert after an Air Law exam, license issued after Type Training. Much of the Far East is the same. The UK will validate a license, and even reciprocate with EASA - even though the reverse is not true.
FAA & Transport Canada readily reciprocate (but you still need an ATP-CTP cour$e).
My recommendation would be for FAA, or EASA only if you have to live and work there. I haven't run the numbers recently, but still believe an FAA>EASA conversion would end up being more cost-effective, and more fun.
This is not 2019, and 300 hours will get you on to an A320!
Good luck.