You my friend, have the luxury of time.
Being 21 you can pretty much do whatever you like.
China usually requires 500-1000 PIC on type but they will occasionally hire FO’s.
Same for Asiana, Korean Air, Qatar, Emirates and so on.
Having the luxury of time gives you the luxury of making a wrong decision or two without it having a major impact.
What is the time to upgrade at your regional and what are you flying now?
If it’s a CRJ you may want to consider switching to one where you’ll fly a 320 or a 73 as those are the two most flown narrow bodies in the world.
Another option as mentioned, ACMI.
Long haul freight. 74/76/77 will give you useful type ratings for the Majors.
No major flying 74 anymore but it’s a “heavy” and you can spend 4-6 years there and work on a degree.
Truly I envy your position.
Mostly your age lol.
I didn’t grow a brain till I was 28.