I wouldn't say you have too many rivers (there are a couple of crazier riverful places on our own earth, after all), but if they stand out too much for you, you could slim them down a little, or replace two rivers with one coiling through the area that they both occupied. I guess it also depends on the kind of look you will eventually aim for - will it remain a basic penned map with some indicative colours, or will it be a satelite map, etc?
Personally, I'd like to see more mountain ranges, the few you have in there now just stand out exactly like that: few. The northeast of the map could be home to a nice spinal mountain range curving along the coastline at some distance. But that's just me.
Some of the coastlines stand out to me as being a little 'blobby', so to speak. The island in the southeast for example reminds me a little of a sock hanging from the mantel, awaiting santa's presents. I'd make those a little more jagged.
Looking forward to seeing this one progress!