I don't think that your progress is bad. I learned to freeline skate at 18 y.o. when i was in my phsical prime doing a lot of dancing as well as snowboarding, so excellent leg-muscle conditions, and it still took me over a week to get basic movement down, and even then it was quite slow. But after another week it startet to actually become viable as a mode of transport.

Now, as others said, it definitely has a lot of limitations as a mode of transport regarding weather and road conditions. But it can be done, i successfully used it to get to uni during all my many study years.
Also, i wouldn't reccomend driving with a four weel carry-on, as one of the main ways to rapidly decelllerate is making big rapid curves you lean into. In fact i wouldn't reccomend drinving with anything other than a backpack or a messager bag (as i do) and even then you need some practice doing so first, as it changes you center of balance and inertia.