O mah gawd...

Peter...
Please don't tell me you were using a Yoda voice ...
When writing the first line of your post...
It would kill me...

And yeah...
Too many question marks concerning the possible unknown variables.

I figure if anyone needs help installing ...
with one of the easiest methods there is... of installing an alternative os ...via chroot
Then they need to go back to actual instructions...read them... reread them...rereread them...
Then practice until they get it.

Chrooting is profoundly easier than many other methods...

I know you are new to the os ...el cid ...
And you are a brave soul to jumping in the deep end of the pool ...takling some of the more advanced stuff...
When you really need to start perhaps more in the middle of the pool...(and not the shallow end of the pool...considering you seem pretty sharp)

But you definitely need to pour over the wiki and the forums various walkthroughs...and the various threads and posts people have painstakingly done to illuminate the best or easiest methods to do things, as much as read the various issues folks have had and how the issues were resolved...if they were resolved...

And expect some trial and error along your Jedi training path with Master Yodaleinchen...