Welcome to FT pye1201

I was like you back in 2008 when we were planning our LONE4 trip - a total noob
Happy to help where I can

Firstly - good idea to break the trip into two parts, and to start somewhere like Jordan, because it so much cheaper than starting from OZ.
I'm sure you realise that you have to somehow get yourselves to the starting point.

Next, fares are a bit cheaper if you start in Egypt (base fare of EGP40,900 about AUD6,300, compared to JOD5100 about AUD7750 - so a saving of about AUD2900 on two tickets). Of course you would have to start from Egypt, but you could still end in Amman - the rules say if you start in the Middle East you must end back there - but not necessarily in the same country

Next - your itinerary is using only 12 of the 16 allowed segments.
No self-respecting FTer would let that happen!
So perhaps during your 9mth stopover in Sydney you could have a couple of short trips? SYD-AKL-SYD and SYD-NOU-SYD come to mind

Do you have a reason for flying VIE-CDG,ORY-EWR,LGA-ORD instead of VIE-CDG-JFK-ORD? You are using 5 segments instead of three ('surface' travel between airports counts as a segment). The two extra segments could be used elsewhere - perhaps additional stopovers in Asia?

The on-line tool has a known bug with itineraries that start with an RJ flight (there's more on this in the 'tool bugs' thread). FTers have identified two workarounds:

1. Play with the tool to find a simplified itinerary that the tool will ticket, then later pay the USD125 change fee to get the itinerary you actually want
2. Set the itinerary up using the AA round-the-world desk, then use an agent in the country of origin to ticket it (AA has an agent in Cairo; not sure about Amman)

There is no requirement to have a US address for your credit card

I doubt you will earn sufficient QF points to do what you want at the end.
Your current itinerary is close to 25,000 miles, so you will earn about 31,000 points, which won't go far (25% bonus for business class; assumes you have no status with Qantas).

Mileage Monkey is useful for planning - as pointed out by Mwenenzi

FYI - here's a link to the fare rules