You might be okay using the 5/16 square. I have never done that only because I have never had to.
Do you have a manual? On jacking, you really have to be careful. There are specific jacking points. Anywhere else risks bending. The round crossmember in the front and the ones toward the front on the rear wheels. At this point, I would jack one wheel at a time and use jackstands along with a wheel chock. I say that because lifting both wheels at the front crossmember risks jack slippage. There should be a slot where the factory jack goes, but it in the way of centering a floor jack.
On the brakes, I would address getting the bleeders loose first, as the system will need to be bled. Caution is in order, as they can be easily broken if you are not careful. I heat them up and soak with something like PB blaster being careful where I point the flame. Be sure they are cool, and use an 8mm hex socket and a 1/4 ratchet. Don't force them and be patient. Be careful around rubber brake parts, as any petroleum based lube will not mix at all with the rubber. In fact, it destroys it.
A clean new turkey baster is sufficient to get most out of the master.
I use Dot 3 and plenty of it, as I like to flush the system completely when doing it. There's a bunch of tips / tricks with working on the calipers and bleeding the system.