Looking for a Prebuilt for my nephew (£900 Budget)

Hi,

My nephew is getting his first PC and unlike mine we don't want to build a PC as it's honestly just easier and more simple to have the entire PC warrantied and individual RMAs and such.

It 100% doesn't need to be playing triple A's at 200fps but it will be for gaming. Things like Call of Duty, minecraft, fortnite classic zoomer stuff.

Is this feasible on this budget? (Excluding monitor as I have a spare). If so what reputable sites to people buy from? Are the ones I see on twitch any good like Starforge?