Having only skimmed your first option, please excuse if I have missed some finer details. You have some tailwheel and radial engine experience?
Good, that'll make you a bit more interesting to ag ops and float ops.
If you can crack a job on a turboprop, even if it's for a regional, do that.
Get those pesky hours out of the way and do the ATPL LST and then consider your options.
Bizjets require hours and experience (usually). By all means start having a chat to them now but usually, the operators won't look at you until you have a few thousand hours. Vital if you want to go LHS.
As for Africa? You might be lucky with your time. New Zealand and Australia will require visas. That's your toughest hurdle. Maldives want a couple of thousand hours plus some float time.
Good luck.