Nice mate.
Is that a WD green drive? Just a bit of general advice if it is, they are perfectly capable storage drives but you’ll want a 7200rpm drive as a minimum for a boot drive, it will sharpen up the boot times and make apps load a bit quicker in general. Not a big deal though.
I’m guessing your old DVD drive had the IDE ribbon cable instead of SATA, I forget some people still rock the old school stuff, haha.
Hopefully you work out the case fans easily enough. Simply, if they are connected to power, they should work. Unless the case has some specific fan controller which I doubt, if the fans aren’t working it could only mean that they aren’t plugged in.