My completely honest answers as someone who used to cook professionally.
Wipe the sides down after for example sticking chicken fillets in the oven or do you just bung them in and ignore any spills?
There wouldn’t be any spills on the side, but if I splashed meat juices somewhere yes I would clean it up.
Avoid touching the oven/other ingredients with raw meat still on your hands or would you just go around touching the other ingredients and the oven without thinking about it?
Depends, if everything is destined for one pan I’d give my hands a quick rinse and carry on working (at home not professionally)
If I was handling raw meat and then something unrelated I’d put everything in the dishwasher / dirty side of the sink unless I need to reuse it then I’d hand wash and yes I would wipe down.
Put any chopping boards/knives that you've used on raw meat straight into the dishwasher or do you leave them lying around or wash them up by hand
Dishwasher if I don’t need to reuse. By hand if I do. I don’t always do it immediately, if the dishwasher is closed I’ll leave them on the dirty side of the sink until there’s a few bits, I will clean the dirty side of the sink when I have finished cooking.
Wash your hands for 20 seconds after handling meat? or just a quick rinse? And would you wipe the taps afterwards or try to avoid touching the tap with stuff on your fingers or just not think about it?
I almost never wash my hands for 20 seconds, for me a thorough hand wash is about the process and routine of it knowing I’ve got everywhere, not the time, and if you cook professionally your hands would be a right state if you took that long every time.
I wouldn’t automatically wipe the taps after a job unless I know I’d contaminated them. I do wipe them after I’ve finished cooking though