setting up TC to act as my sole router, using Sky fibre as my ISP

Hi,

I currently have Bt Infinity, with a TC acting as my router - the only one i have in the house

To arrange this, i had to use the btbroadband@btinternet settings for the TC to act as the router (i did away with the BT standard router, and not using the TC as a bridge)

I am now combining my TV and phone package, and therefore going for Sky Fibre as my ISP.

Before i do so, what steps would i need to take to keep my existing set up, only this time with Sky as my ISP - i dont want to use the router that Sky provide and keep using the TC as my hub.

Thanks - Nick