Like you realised, you're in the wrong forum, but you can still repost your question in the right place
Please do some searching before you do anything. I've read a few of your posts and you don't seem to like to use Google to find things by yourself.
For that phone, think you'll need to unlock bootloader (you've asked about how to do it before), install a custom recovery, make a nandroid backup, then full wipe and flash the ROM. These are standard steps widely available
Instructions will also be in that particular ROM thread.
But like I said, please do some searching for guides as they are all there. The more you read, the more you learn, less chance of things going wrong again
Best of luck.