Thanks! Yes the rivers need a lot more work. I have seen a tutorial here for making tapered rivers so I'm going to look into that.

I think I will try this again and place the rivers and lakes in first as I have found It is easier to place more realistic land form into it than trying to force rivers into the land form.

Been having a hard time finding a land color I like so I will try darkening the sea instead.

And Yes half way through the mountain I was aware of the strange shape. It reminded me more of a fossilised fish more than a mountain.