Anyone got any recommended sites that have stuff to do with getting apk's onto a firetv, roms etc that I could give to my cousins kids to have a play with the fire tv they have now got?

Ive chucked a n64 emulator and goldeneye on which is a game they wanted, but would like things that cover how to do it without an android device since they dont have one.

The better the howto's are, the less I have to be involved in it.