I know just what you mean. I'm a SAHM with a 3yo and a 2yo, and I am taking 2 6-week express classes for college. Some days I say "I'm going to get this, this, and this done, but before I know it, my day is nearly over, and I haven't completed half of what I hoped to." Right now it's just baby steps for me, but I know as long as I keep working at it, I'll get there.
BTW, I've seen some of your stuff, and it's cute.
We can never be great at everything, but if we keep working at it, we'll continue to get better--that's something I have to remind myself of sometimes.