Building pc help needed

[BlueSpartan]

I am not sure if this is the right place to post this but I need some advice.

Ok I have some parts coming next week:
1x Case (Collmaster haf 912 plus
1x I5 3570k plus aftermarket cooler
8gb ram

So here Is where I need some help I plan to strip most parts out of my current pc, How hard is this to do? anything I should do when removing the items?
and the next question how easy is it to build a pc? screwing in the motherboard looks really confusing lining up the holes seems like a challenege any help would be great

 

[BlueSpartan]

Make sure the power is off first.

That did not help....

 

[BlueSpartan]

I plan on using my current hdd in my new case and have windows 8 arriving what do I need to do