Welcome. Your initial map reminds me so much of my first conworld map, 20 years back - a huge ridge in the north and then a quasi-rectangle peninsula with a couple of islands. Maybe there's 1000's of con-peninsulas with con-islands and con-northern mountain ranges splitting it from the rest of the world out there

Anyway, a quick advice for your drafting - set some kind of scale: either linear or a graticule (latitude-longitude). This will become very handy as you compare back and forth your map with real locations, when you try to work out climates or when you try to figure traveling distances and the like.