Detailed instructions on how to stream ( Xfinity stream) away from my wifi using Plex

roku

#1

Hello,
Thank you in advance. I am not tech inclined but will do my best to explained. How can I stream all my xfinity content to my Roku. From my readings and interactions I need:
Plex pass
Roku
Will use my iMac Intel Core i3 with 2T of storage server.

Do I Need something else and how do I connect ?

Thanks