Narciss

Hi, i just want to know, im really not an expert in phones ect.. so if i install cyanogenmod on my galaxxy s4, it will allow me to play PRO but there are a risk for my phone ? i dont want to ruin it for a game and will the interface of my phone will change with cyanogenmod ? I dont want any changes or what :/

Hi, i'm on a galaxy S4 and i'm stuck everytime at loading hats, i've tried the clean installation but it didn't succeed, so do you have some solution for me? thanks