OK. CYA or Stabilizer is like sunscreen for Chlorine, BUT it slows Chlorine's action down. So the levels are a balance.

Yes, you have a CYA test in your K-2006 It consists of a small squeeze bottle with a line in the middle and a line near the top, a tall thin tube with a black dot on the bottom, and a bottle of R-0013.
You fill the squeeze bottle to the lower line with pool water,
fill to the upper line with R-0013.
Then shake for 30 seconds.
Now hold the tube with the black dot at your waist or belt and face the sun.
Look down into the tube and slowly squeeze the fluid from the squeeze bottle into it.
Concentrate on the black dot at the bottom as you add fluid.
When the dot disappears (the fluid is cloudy if there's CYA), stop.
Now read the level on the side of the tube.

If you aren't sure, carefully pour the fluid from the tube back into the squeeze bottle and do the test again.
You can do it as many times as you like without using more pool water or R-0013, until you are pretty confident.

CC is irritating to the skin and eyes, and gives your pool that "chlorine smell". It also doesn't sanitize any more.

Dichlor adds chlorine and CYA. Bleach adds only chlorine. That's the difference.

Borax raises pH, making the pool less acid. It doesn't have as much effect on "total alkalinity" as do other pH raisers. You can use pool store "pH Up!" or other brand names to raise pH but you'll be paying $3 - $4 a pound for what is basically Arm&Hammer Washing Soda (NOT, NOT, NOT Baking soda!) and costs about $1/pound.

But most of us prefer to use Borax to raise pH.

For now, don't worry about total alkalinity. Just worry about FC (and CC), pH and CYA.