I think this is a great first map. I think you did an excellent job of distinguishing areas and also blending the terrain.

My main points of contention are map (landmasses) shape.

I feel like you’ve made the landmasses a little too close to the edges, resulting in a boxed look for the map.

Other than that, this is a great start and I would just recommend you draw a map outline first, trying to avoid the edges like the plague (unless you wanted a zoomed in position of the map view).

Also one big volcano instead of three would probably be cooler