Hey Frost413
Personally I like the method described in this vid:
https://youtu.be/ZWesW8aX8yc
I'm not sure I follow your question 100%, but regarding where your figure-8 goes - in the linked vid it goes between you and the draw on the anchor which the rope is clipped into. Which makes sense to me as you'd want your belay system running through the anchor - tying the figure-8 on the 'other' side of the anchor draw could mean you'd potentially fall until your last draw on the route catches you (so, you're still 'on belay', but it's a longer fall, more shock-loading, etc.).
It's not always made obvious in some of the tutorials out there, but (in addition to keeping you 'on belay') a neat part of tying in on that figure-8 is that you can't drop the rope (if you fumble it, for example, while threading it through the chains).
- g
DISCLAIMER: I've only been climbing a few months

Interested to hear more experienced climbers' take on this.