I like the islands and how the mountains near the coast make for a rougher coadtline as they generally do on Earth. Only issue is the orientation of rivers. On Earth rivers tend to flow from the interior of landmasses and in a relatively direct path to the coast, the Niger River in West Africa being a notable exception to that rule of thumb. On Earth, rivers always meet and never split except when the slope is low and/or the river is depositing lots of sediment, but in a fantasy world like yours there could magical explanations or some ancient civilization might have diverted rivers for some reason. Also, unsusual to see rivers draining into a lake so close to the coast, that water will normally want to drain to the sea rather than sit in a lake. Again, possible explanations for this. Coastal highlands that block off the path of drainage to the sea? Low lying rift valley a la the Dead Sea? Barrage built by an ancient civilization? 

t. amateur cartographer who's made a few fantasy maps and took a geography class in college. Not trying to nitpick or be a dick. Just legit constructive feedback. Keep it up.