Layer mask not working (weaving text)
After learning about layer masks and the cool feature of weaving cursive font around block fonts, I started working on a couple practice images (shown below).
I was able to do it twice, and then suddenly my layer masks stopped working as they should.
I followed the same tutorials, did the same steps, but am NOT getting the same results.
Now it's just painting black or white, instead of removing or revealing parts of the image below the layer mask. At some times, the pain brush does nothing. (Note the "N" below)

I have spent 2 hours trouble shooting with different Youtube videos, and am completely stumped.
What I have tried:
- Reseting tools/preferences
- Quitting + Restarting Photoshop + my computer
- Double clicking "quick mask" areas an ensuring "masked areas" is selected

Ironically, this is only my second day of owning photoshop, so I wonder if there is a very obvious user error that I am unaware of.
