Hey Jethro, welcome.
Very few Taiwanese are active on scubaboard. And actually, the same is also true for expats living in Taiwan. Most Taiwanese divers, and most expats who dive in Taiwan, are not active on scubaboard. There are a lot of folks who dive all the time, though, so don't mistake a quiet forum here for a lack of divers.
There is an English language Facebook group dedicated to diving in Taiwan -- I think Andy Gray started it (Andy is Ambertiger here on scubaboard) -- and some of my dive buddies are active there. I don't use Facebook, so I can't give you the details.
If you are Taiwanese, and/or if you can speak Mandarin Chinese and/or Taiwanese: again, it's mostly discussed on FB and other social media other than scubaboard. Most divers in Taiwan are Taiwanese, of course, so mostly they discuss stuff in Taiwanese or Mandarin Chinese -- not English.
I was in Kending last weekend diving with a bunch of friends -- some dive buddies from Taipei, some from Taichung, some from Kaohsiung, and a couple of us were from smaller cities or towns. Great diving: pygmy seahorses, cuttlefish, all sorts of nudibranchs, etc. etc. Viz was 35 meters at the boat diving sites, and 15 - 25 meters at shore diving sites.
For a variety of reasons I won't be able to dive with you in Kending any time within the next few months. I can, however, recommend some local scuba professionals who can guide you around the Kending reefs for a modest service fee.
PM me if you want to.
Cheers,
M