Editing a world map

[Deadshade]

There are some tutorials for Wilbur at the bottom of the official download page here: Current Wilbur Version

Thanks. I have already read that but this is not a tutorial. This is an example of creating a map using perhaps 1/100 of the available options.
I meant a true tutorial explaining how the commands in the software work.
For example : I have an island, how do I create a mountain in the middle of it ? Or how do I color the seas blue ?

Also there is perhaps a better adapted software. Time and money is not an issue for me. I mostly need something that I can learn to use and that does what I'd like to do e.g fill up land masses with mountains, rivers forests and deserts.