Thank you guys for nice replies.

- At the moment I am working on appropriate patterns, but still didn't found the good fit for snowy/green territory.
- Also tried to play with "Enboss" filter for making mountains, but didn't succeed as well. But practice makes perfect.
- Changed north river as you mentioned, and turned an area of two other rivers into major swamps.
- Another thing figured out recently is that it's a good idea to use one pattern of a different colour for the whole landmass. Am I correct?
- Answering your questions, I am not yet sure about the scale of this continent, but I am not looking for it to be quite big. And no, I am not planning to add other landmass in this world, since it has no story behind it, while this continent can perfectly fit for a practice.

Will add the progress picture as there will be any significant difference.