Default LG F320K Rooting and flashing help

Hey all,
I have just purchased a LG F320K 32gb (Software Version F320K11K)
I was wondering if anyone can point me in the right direction if a step by step guide (I know there will be quite a few different ways) to rooting and flashing so I can change it to UK English version on three network instead of Korean olleh network?
after reading posts for hours I'm just getting more and more confused!

P.s. I'm a newbie at all this

Cheers
Chris