Doing it as a learning exercise absolutely makes a lot of sense.

But selling it? Trying to get a grant for it? I'm going to be a bit blunter here than I usually am online – the idea of making money from sharing knowledge that you don't really possess yourself, particularly when it comes to a rare and marginalised language like Greenlandic, seems really questionable to me. First, you're almost certain to pass on errors that you don't know about. Second, you're putting yourself in front of people who actually do have that knowledge. There's something almost colonialist about it.

Having said that, it would be great if there were better Greenlandic textbooks! Maybe there are other ways you could help that to happen?