This site covers a HUGE range of car detailing info and includes demo videos etc.
www.detailingworld.co.uk
Also look at youtube for videos.
A good tip is do what Idid by practising on a fridge and scrap panels. Go to a bodyshop and ask for ones they have taken off cars.
Once you gain confidence it gives great satisfaction.
Remember though that there is no need to go full detailing too frequently.

Plus Four MY23 Furka Rouge