Hi there! I'm new to Krita and only used to the simplest of simple programs, so 99% of Krita is seriously confusing me.

When I very first opened it up and began testing different brushes, I noticed one thing that I will NOT put up with; the size of the brush stroke changes with the amount of pressure I put on my pen. The harder I press, the bigger the brush gets. I'm used to the color getting darker with more pressure and lighter with less, obviously, but not the SIZE.
How can I change it so where the pressure I put on the pen only changes the opacity or whatever, instead of changing the SIZE?

Go to the brush editor and disable the check in front of the 'size' entry.