diy plastering advice

Hi all, Hoping you can help. I have plastered a room before but I put plasterboard up so was fairly easy. We've been quoted £2000 for our bedroom and I just can't part with the cash when I know I can at least have a go myself! But I'm unsure how to prep the walls read for a skim. I'll attach...

Hi, i’m attempting to re-plaster my kitchen and need some advice on the steps to do so. Currently the kitchen walls are a bit of a state, it used to have wall paper on however this was taken off many years ago. Now what is left on the walls is paint and (what i’m guessing is plaster) which is...