Wanting to buy a prebuilt pc

I know I'm gonna get quite a lot of comments for wanting to buy a pre-built pc, however, it's gonna be my first pc and I don't want to spend £1k in parts for me to f*ck it up.

Where would you guys recommend buying a prebuilt pc? I'm wanting something with a ryzen 7 3600x, with a 2070 super with 16 GB of ram

So I'm happy spending around 1k-1.5k

However, where would you recommend buying it?

Based in the UK