In answer to the original question:
Too late for 2022?
No, it's too late for 2021 but not for 2022. You won't get a job here unless you come here and stay here and keep in contact with the operators here and as many people as you can.
A GA Ready course ? You'll get that at your job as soon as you finish the induction paperwork - they won't send you anywhere until they're happy you can handle all the weird stuff that will happen. People above have mentioned fuel drums, pax handling, oil changes, yeah, all that. However even if your GA Ready course gives you one extra little factoid that a company may later miss, that may pay off later and it should be worth it. How much are you paying ?
What you should be getting in any course or in your company is having your head stuffed full of information hard-won by others, a good set of your own hand scrawled notes, your hands on as much as can fit into hours in the day, and physically hammered to acclimatise to flying in the bush because to do it properly you need to do it at a pace that I call 'airborne labouring'. At the end of each day of your course, be it GA-R or post company induction, you need to be full and ready for a big feed and a snooze, and that needs to go on for 1-2 weeks. If you finish the day clean and relaxed, then you're not getting what you need.