Thinking of getting a Go Gen 2 Lumi - questions

I'm thinking seriously of getting a Go Get 2 Lumi as a secondary device. I do most of my reading on a Kobo Clara BW, and most of my computing (a lot of reading and writing) on a MacBook Air, but I'm starting to suffer from some eyestrain with the Air. I don't expect the Go to be a complete replacement for the Air, but I have these questions:

1. Would it work as a device for writing with a Bluetooth keyboard? I keep my files in plain text or Markdown, and usually write in Obsidian. Can Obsidian be installed and used in the Go's Android OS?

2. Is the screen responsive enough for typing?

3. Can I install KOReader on the Go? (I suspect I can, but since I'm asking...)

4. How is the screen, really? I've seen reviews complain about ghosting, which between my Clara BW and earlier Kindle use I don't think I've ever experienced...or if I did, I didn't notice it. How is it in everyday use?

Thanks!