My build (including Windows and DVD burner):
https://au.pcpartpicker.com/list/zx74Gf
I put in an SSHD after reading that you wanted at least 500GB.
CPU has a cooler.
An SSHD has 8GB of SSD memory. That may not sound like a lot, but it buffers BOOT files and frequently used files. It's in between an SSD and HDD in terms of performance. So it's going to bootup a bit faster, and launch some programs faster than an HDD (it takes several days to optimize as the firmware LEARNS the user habits).
(personally I'd still get a 256GB Sandisk and then add an HDD later if the space is needed. Addon HDD is also useful to BACKUP the C-drive in case of drive failure or data corruption but it obviously adds to the cost, though a USED HDD might be found cheaply and if it's a backup drive it's not that critical)
The REST of it is pretty self-explanatory. (but don't get a case with a side window, or blue TRIM unless your grandmother likes the bling bling)
I also tried to look online for pre-built computers but didn't know where to go in Australia. I found a few places but prices seemed high.
Other:
Windows 10 should download all the drivers you need. You will want to go to the Asus site for that exact board and get the FAN SOFTWARE (if it doesn't come on CD). Then setup an appropriate fan profile to minimize noise. The BIOS should have a fan profile by default but it's rarely optimal; usually noisier than needed.
If it gets HOT which I'm guessing it does you may want to get a different CPU cooler like the Cryorig H7 but that's more about NOISE reduction so you can always wait and see what the noise level is.