mobile

Hello, everyone. I'm new to Android. I recently purchased a new Samsung Galaxy S4 GPE. I love the phone, but lollipop is very buggy. I liked KITKAT 4.4.4. I was curious if someone could help a new user in a step by step fashion how to downgrade my GPE lollipop to kitkat 4.4.4??? Basically how to root, unlock bootloader, flash rom, etc. I would be entirely grateful. Not sure where to start and do not want to brick my phone. God bless.