I am always amazed to see this kind of question popping after a maybe expensive CPL-IR and expensive and most of the times useless MCC/JOC/TR...
This question should have been a concerned at the PPL level. You have trained to be a first officer, now getting an instructor rating with the hope to get a C150 job is a bit weird.
If you want to be a flight instructor here is the route: become a glider or ultra light instructor, make some contacts, then get a cheap CPL and instructor rating, get an instructor job thanks to your contacts and your instructor experience, at around 2000 hours get your multi, IR and theory ATPL, instruct multi IFR, at around 3000 hours get a MCC, you should be able to secure a first officer job on small turboprop and continue to climb the ladder from there.
This path is progressive, unexpensive, almost risk free career wise.
You haven't choosen this path and started to get ready to be trained as a non experienced first officer by spending huge amount of cash already. I would say be logic and continue. Maybe buy a type rating, you have entered the lottery system where essentially money and luck makes the difference.
Going for instructor on small airplanes and its low wage now after all the monney you have already spent might make you a frustrated worker for YEARS. In addition the instructor path is not an easy one, if it happens you don't like it and become a bad instructor, it will be hard to make contacts and progress to the multi/IFR instruction that opens many doors.
Spend some more in a type, go abroad maybe to improve you chance at this lottery mad game you have accepted to participate, there is some hiring, who knows...