Djay2 Automix help please

Hi a really basic question, hope someone can help. Just needed basic help with Automix. I have a bunch of tracks I would like to Automix in Queue, they are also all
In Precious Sessions.

How do I get them all to Automix?
Does Automix randomly choose the order, are there parameter like tempo/key I should select first, and do I need to select them individually?

Also would the quality high enough to record the Automix via my headphone jack to be played on a small sound system for a kids party!?

Running Djay2 on a iPhone 6

Many thanks