They look very nice and clean! As others have said, I think having a little more line weight would be helpful in making things really pop. I used to have rather thick lineart; it's been slimming down subtly over the years as I've become more confident with detail, and it's settled at a kind of medium thickness where I can still push variation in line weight without the lines being the main focus of the drawing. I think medium line weight is pretty ideal for toony comics.
A big challenge is that thinner lines don't mask mistakes the way thicker lines can. That means you'll be wanting to focus on drawing fundamentals a lot more; fabric folds is one. (I'm also terrible at those...) Grab some photos of loose-necked turtlenecks and do some tracing, some eyeballing from reference, and finally some stylisation of the folds to simplify them into your style.
The eyes on the fox look really nice, I like how the lower eyelashes are detached. It's a nice style.