Hi xxinxsxx and welcome to MyCE. :flower:
There are 240 odd channels with 'FreeSatFromSky' compared to about 70 odd from 'Freesat'.
So you'd be better just keep your existing setup and your Sky card will automatically be downgraded to a 'FreeSatFromSky' card when your subscription is terminated.
BTW each Sky+ box requires two cables coming from the dish fed from either a twin or quad LNB.
So if you've been using Sky+ then there should be at least two cables coming from the dish.
Bear in mind though the record function won't work without a Sky subscription.