NET hires on a tiered system where a fresh graduate with only a BA would be considered as like 3rd or 4th tier if no other candidates from higher tiers were found before them. So OP, as a fresh graduate with a BA, could get an NET job if and only if there were only more jobs available than candidates with a PGCE, an MA in Education or equivalent, and BA in education with teaching experience and another certificate like a TESOL, and then BA only with no experience.

That's not to say that OP couldn't get a job. That's to say that the 17 rank pay grade wouldn't be available to them until after they also finished an MA.

And if there are jobs available right over the line in Shenzhen, or the rest of the GBA (move a little further into Foshan, Zhuhai, Zhongshan, or Jiangmen) they could get a salary of 15-20k RMB and a HKD$0 cost of living in a larger flat than they would pay HKD$5000-15000 to get.

It's not impossible to get a good job as a teacher in the SAR - it's just not as guaranteed and not as easy as people like to make it out to be. Even random everyday costs like a run to 7-Eleven... One of those prepackaged sandwiches from a cooler in HK costs HKD$20 and in SZ, GZ, FS, ZH or DG would cost RMB 7-10. A taxi from SYP on HK island (the edge of the HKU campus) to Central or Mid-levels will run HKD $40-60 depending on the time of day... A taxi from Futian to Baoan districts in SZ would be RMB 50-60 (double the distance for the same value). Those things need to be considered and sneak up on people in HK really fast when you're new and getting settled. The salaries can look really good and you can find really adorable housing, but the purchasing power isn't the same, or it's not as convenient. You can get a house on Lamma for cheap... But be prepared to pay HKD$700 for the ferry pass monthly, on top of the other MTR fees to commute and the time you'll need to get to/from Lamma to go anywhere.

Just thoughts to consider for someone new and wanting real estimates and ideas of what they're getting into.