Hi and welcome, Mr. Coktail . Yeah, an attached image is fine.
As far as I'm concerned, the landforms look like they could result from natural processes (except for the cracking up - but you covered that), more to the point they look good visually, which is just as important in a fantasy map. From your distribution of terrain features, it would seem your islands get their prevailing moist (warm) winds from the south-west. Unless you have volcanic or thermal effects in the middle "seas" I would think your jungles would be further south-west (air loses moisture over land). Your massive delta looks incongruous - it doesn't fit. You have dry, rocky land in the north - then "wham", massive delta. For a massive river delta you need a huge river system feeding into the sea and depositing sediment. For a delta of that size, those mountains would have to be really huge or you would need some other source of water, like a divine hot spring or something. Personally, I don't think such a small montane region could naturally provide enough water to create such a large delta.
Did i mention I liked how it looks? Because I do. The forms are a really good starting point for a map, if you ask me.