Hey, sweetheart! Thank you so much, first of all, for enjoying my work. I'm way pleased to hear that it's being loved! I do have some advice for you, my dear! First off, don't get frustrated when you're first starting out. I was HORRIBLE when I first started doing digital art. It's definitely a learning curve. Just keep practicing, love every piece you do, and you'll find you get better. Right, so when drawing cats, always ALWAYS start with a skeletal structure. That doesn't mean draw all the bones. It's pretty much saying to draw a wire-like structure that will give you the approximate size, flow, and pose of your cat. It really helps you know how you're starting and kind of what you want your outcome to be.
Next, draw a ROUGH sketch over this. And I mean ROUGH. Keep your pen fluid and play around with proportions and see if the pose really works. When you're done with your rough sketch, and you have an idea of what you want, lay down the real inking. This shouldn't be sketchy, but should look polished. All details here are finalized! If you want to make changes to your rough sketch so your final sketch looks nice, do it at this point in your drawing.
Layers are UBER important if you're doing digital art. Why? Because they make sure that if you make a mistake, it's easily fixed without ruining the rest of your painting. I suggest using a layer for the base color of your cat, then another layer for markings, another layer for different markings, etc. I LOVE layers because I know I can change that layer around without affecting the rest of my piece.
Do you have any other questions? Anything you want me to be more specific on? Also, I'm working on a tutorial video that I want to have posted by next week. I'll go over a lot of things in it!