This thread details how to attach photos-
How To Embed Photos. URL are the web address the photo is associated to which can on,h be obtained via a photo hosting website. It is easier to upload photos straight from your device after being resized.
Depending upon the size of cage I would only advise doing a spot clean at the moment (as partial clean are only really needed every 4 weeks or I wouldn’t never recommend doing an entire full clean as this can be really stressful ) as hamsters are fairly clean animals so just remove areas of pee and areas with lot and of poos. Once you cleaned the coconut put some bedding/substrate already in his cage in the coconut so it will still smell like him.
When you are doing any form of cleaning in the cage I would put your hamster in a carrier or a playpen just so you won’t stress him out.