This is awesome! Love the Sword and sandal theme.
This Inkarnate makes cool maps. I've been using wonderdraft and finding it... quite slow to make it look good.
How is Inkarnate?
Inkarnate is really good. I pay a $5 subscription for more content, but the free content is good as well. Mostly you can paint the terrain, draw landmasses (you can even set how uneven coastlines will be), and place assets like mountains, towns, text, images, etc. With the subscription it lets you upload your own assets as well. There is a way to take notes if you want to worldbuild and describe each place, but it isn't too robust -- just drop a pin and it opens a window to type. It has different genre of maps as well, such as a more archaic theme, or a top-down battle map style for DnD.