Welcome to the Guild! I do like this map, but a scale might help make a little more sense of things. If there's really only one river worth showing, this either a pretty tiny area, a pretty dry area (which seems not to be the case based on the woodland areas), or a really BIG area where only a 'father of rivers' is shown.
As far as the labeling style... I like the font - it does the primary job of a font very well, which is to be legible. Not a huge fan of the purple color, but that's just down to personal preference. I think your font size and placement in general looks okay, with the exception of 'The Confederacy of Pentisl'. I've run into this problem also, where you have two relatively similar landmasses or islands making up one nation, and have to figure out a graceful way of showing that they're linked. I haven't been able to come up with anything really satisfying in that regard though, so unfortunately I can't help much there.
Hex grid works fine.