Welcome to the guild Grant! I like what you have so far and I have no mayor criticism. My two nitpicks:
1. Not too fond of the mountains, but wasn't too fond of the mountains in Ascension's atlass style either. I would try and make them stand out from the land a bit more.
2. Parts of the coast look very pixelated.
Otherwise a good start as I said and all the rivers seem to be in order as well. Maps like this really start to shine when you add in all the details (places of interest, labeling and perhaps a cartouche and border).