First you need adb. Download for Windows | Mac | Linux | Ubuntucan you give us step by step instruction to install the rom and how to format data partition to f2fs that could very helpful
Then wipe data and cache and flash CM11 with 3.0 kernel and Gapps. Don't reboot.
Now mount system and data partitions using TWRP then connect the phone to the PC.
On Linux or Mac open a terminal and enter the following commands, then your password:
Code:
sudo adb start-server
Code:
adb start-server
Code:
adb shell
/system/bin/mkfs.f2fs /dev/block/mmcblk1p25
Then you can close adb and reboot.