Got new box and remote. Have a roku tv. Went to cable box to connect and got to welcome to your enter. experience. But no further

Hello user_lgfugi thanks so much for reaching out here via our Xfinity Forums! Is this still a concern for you, or have you been able to fully activate the new cable box? 

We have several articles that can help when activating new equipment: 

Xfinity - Getting Started Kit Installation Instructions And Guides

Xi5 and Xi6 Get Started Guide

XG1v4 Get Started Guide

Please let me know if these help, and if you have any other concerns or questions.