Instead, I installed CalyxOS and have been using it over a year now and I'm very happy with it. Check it out.
You have to be aware that you give that person root when you use Graphene. All possible technical improvements aside this is a very big risk. He claimed he would step back after the video released, then called that a lie and continued with everything.
Calyx seems to be the best alternative right now without such a risk factor.