This worked well for us. Just don’t be phased by mild pissing of water.
Think of it like mechanical disc brakes - unscrew til it’s really shit then screw in a tad more til it’s not pissing out so much and twist the rad down. Tighten the nuts whilst you’re doing your thing, then reverse proceedings.
we removed ours and it wasn't too hard and I'm really not that good at diy - just make sure your thermostatic valve is working (or replace it for a decorators cap before closing the valve). We spent a good hour waiting for the radiator to drain before realising the valve was still open
Personally, I am concerned about messing about with a heating system when I need it to work.
But the trick is make sure both valves can fully shut. Then as others have shown the technique to get behind the rad. I'd support the bottom of the rad too.
Can it wait till after the heating goes off?
Actually do you have a combi boiler and what are the taps either side of the rad like?