Kindle setup to learn Japanese?

Bit of a specific question, but I'm trying to cut down on the time I spend on the phone, and one way to do that is practice my Japanese. The problem is that I have my dictionary and a few texts on the phone, and I'm still in kind of the earlier stages of learning so I have to constantly look up words.

I got a collection of manga in Japanese I can read on my free time, but to look up words I would have to use my cellphone. I was wondering, is there a dictionary you can recommend for the Kindle? Can you install a Japanese keyboard to make it easier to look up words? Do you use a Kindle in any way in your learning journey?

Thanks in advance!