I have been using Krita for a few weeks and I am having some problems.

My first problem is that I want to turn on this Colorize mask I read about but I understand you can only do that in the config file which I can't find, The faq doesn't help because it doesn't say more then %APPDATA%\krita which from what I see isn't a top level directory.

My second problem is when I am using my Huion tablet and I have the work space zoomed out to a certain point, like full or close to it, there is a tiny almost slight delay after a brush stroke, and that can throw things off while I am sketching.

Any help would be appreciated.

Regrading your performance issue, you can try o disable OpenGL in Settings -> Configure Krita -> Display -> Uncheck OpenGl.
I've seen some users report performance increase after that.
How big is your document?
How many RAM does your PC have? You can try to increase max memory allocation in Settings-> Configure Krita -> Performance -> Memory Limit.
Restart Krita after making any changes in Settings.

Turning of opengl helped, out of curiosity what advantage was opengl supposed to have?

With OpenGL panning, scaling and rotating the canvas is faster.

I still can't find the config file, and I also came up with more question.

I am using a huion tablet and I am having trouble setting the zoom in, I just end up in zoom mode, I'm tempted to re key the zoom out button to rotate but I'd prefer to keep them as labeled, any way to make the zoom in actually zoom in? also is there any way a person could make the zoom focus on where the mouse is?

And when I use pressure sensitive brushes some start too small regardless of the size of the brush, which is fine for some things but sometimes I want the starting size to be a little larger is there a way to control this with out changing my pressure settings?

Sorry is this questions are annoying but I am relatively new at using some of this.

There is two ways to setting zoom. First assign tablet buttons as Scroll up and scroll down. This way it should also zoom in cursor position.
Other way is check which buttons used for zoom (settings > canvas input > zoom) and assign tablet to these buttons (like + and -).

Don't know about pressure. If it isn't some smoothing options then it's probably tablet problem. I don't have such thing on my wacom (sometimes I have opposite actually).

I've dealt with most of my questions but I still can't find the config file. I want to try this colorize mask feature out, I've tried the tools in Gmic but it's rather cumbersome and I want to see if the colorize mask is better.