Kodi for ATV1 (sorry…. newbie!!!)

I know, I know… not supported anymore… just found my old ATV1 and thought I could do something with it… and it seems it IS possible.. but it has been years since I did anything with it. It is currently running XBMC through crystalbuntu so it seems like there is a way to transition to kodi…. but I am SO lost. I will say NEWBIE simply because clearly I haven’t touched this 3.5 years and don’t seem to remember any of this stuff haha.

I read another post which seemed to explain it but the poster wasn’t running crystalbuntu so it seemed like there were a bunch of steps that I wouldn’t need to do to transition..then where i thought there would be a DL file…. the link took me over to the OSMC fourms.. but not to a specific thread. is there a step by step guide to do this somewhere and I have just missed it?

I’m so sorry in advance for being the a-hole to ask what is seemingly a likely very stupid question to most of you hereAngel

Warm regards
Jena