Hm, I built my first gaming of last summer with a i5 3570k and OC'D quite easily to 4.5ghz
I would say go for it on first build, just watch tutorials and also never OC using programs always do it through BIOS
I remember it consisting of changing frequency, voltage tweaking and some ram frequency changing and hours of burn tests
Oh yeah if you buying something like a hyper 212 cooler get low profile ram
I personal like to buy the $400+ cards cuz I like to max everything out, I would go all out on your first build ha
My specs if you interested:
I5 3570k
Gtx 670 ftw edition
Hyper 212 Evo (CPU cooler) only 30 bucks and it rocks!
500GB WD
256GB Samsung 830 SSD
Asus P8z77-v pro mobo
XFX 750w PSU
If you want I can sell you my parts for discount, plan on upgrading soon as well XD