Noob

Hi,

I was hoping to be able to figure this out by simply reading through other posts, however I must admit that I could use some guidance.
I’ve had a jail-broken AppleTv 2 for about 3 years now, and was always able to have it fixed by the guy that sold it to me. Unfortunately, I have not been able to reach him for a little over a month, and would like to learn how to update/fix it on my own.
I do not have much tech experience, however I am very good at following instructions. The problem is, I don’t really know where to start, nor do I understand the jargon (ex: SSH).

Would any of you be so kind as to detail what steps I need to follow (and programs I need to download), or perhaps link to the appropriate threads?

I am currently still running XMBC, as opposed to Kodi.

Thanks in advance