New Internet Setup

I am new to Xfinity and need some clarification. I have a compatible modem/router and just created my account and everything. I am signed up to get Performance Select internet at my new house. What all do I need for internet setup besides my compatible modem/router? And do I just set everything up myself? I've only had CenturyLink before and they can be a pain as far as getting set up because you need to schedule appointments with technicians and all that jazz. Just making sure I'm not missing something with Xfinity setup. Thanks in advance!