Now, I can’t claim to be an expert modeler, but I do believe I’ve picked up some from my not really mentor and first critic. [Paging @chimeforest]
First off, you’ve managed to avoid the trap most newbies, including myself, fell into. You haven’t added too high of a resolution, and you haven’t over-rounded. In fact, I think you could even go a bit further! So that you can get the size right, I suggest checking out the standard worker templates over here. Once you make your models a bit more to scale, rounding the corners by 1-3 voxels, as is Stonehearth’s general style, should feel more natural.
Your colors do have a bit too much contrast. That blue is fairly good, but I’d recommend toning down the greens and the red. The shoes work well too; try to bring the pants color down a bit to match.
Also, I’d recommend using more than one shade of blue for the shirt. Convey as much detail as you can using colors instead of voxels. You’ll find out where this line is when you go along.