Rear wheel bearing -looking for hints and tips

[Jamieg285]

Having a go at my first chain and sprocket change this afternoon, but as I pulled the rear wheel out, the left spacer fell out and exposed a totally knackered bearing.

It will obviously need to be replaced, but this is another job of which I have zero experience. I'm looking for as much info and advice as I can get before I attack this in a few days time.

Are these bearings ones that are best replaced with OEM, or would Wemoto parts or similar be OK?

Thanks in advance,

Jamie