You also asked for tips building a pc. I've built a few and I'm sure everyone has their own methods.
I like to begin by having a workspace like a table top (hard surface, not on the carpet or a bed where there's increased chance of static shock to components). Make sure I have everything I need ahead of time. I try to avoid magnetized tools. Open the pc case and take a look around, familiarize yourself with the basic layout. The case you chose looks like it's easier to work with, appears to have a cut out behind the cpu to make install of the cooler easier.
I'm not certain if this case comes with a power supply but you wanted a different one in any case so I would begin there. Easier to swap out the power supply since it sits in the bottom of the case. That way you're not bumping into the motherboard with it during install. Then insert the standoffs needed for your motherboard and screw down the motherboard. Next I'd attach the mounting bracket to the motherboard for the cpu cooler before putting the cpu in place (to prevent accidentally knocking into it).
Insert the cpu and lock it into the socket, following the directions to make sure it's aligned properly. Take your time since it's not a race, it'll prevent things like bent pins. Try and handle chips (cpu and ram) by their edges when possible. Next I'd install the ram and lock it into the appropriate slots. The motherboard instructions will tell you which slots for dual channel and they're color coded. Once all those things were in place I'd move on to applying the thermal paste and installing the cpu cooler. This is so you're not trying to tuck ram in under the cooler if there's tight clearance.
The rest is pretty easy, just add in the graphics card, make sure all your power cables and front panel cables are plugged in, fans etc. When it comes to case fans and you're not sure which direction to install them, wait until the hard drive(s) etc are all plugged in and power on your pc. Plug your fan into a fan header and feel the direction of airflow, then install the fan accordingly (so you don't have an exhaust fan blowing back into the case and end up having to uninstall it and re install it the other way). DO make sure even if no other fans are connected that your heatsink and fan are installed on your cpu if powering up the system. Don't ever run it, even 'quickly' without that cooler.
Once everything works, then you can work on routing your various power and data cables through the grommets and cut outs in the back panel of the case to hide the majority of the wiring. Makes it look cleaner and helps improve airflow.
Any additional wires and cables not used I typically use small plastic zip ties and fold them up, zip tie them together and tuck them out of the way so there isn't a rat's nest of wires in there. If you don't have an anti static wrist strap then the next best thing is to keep one hand in contact with the metal on the case to prevent static build up and potentially run static discharge into components. Kind of rare but can happen. Biggest thing is have fun doing it. If you forget to put a screw in someplace or anything you can always go back and put it in so don't sweat it.