Complete preparation room Mönchengladbach ?

I’m looking for a way to make my Audi A3 BJ 2004 “beautiful” again ! Unfortunately, the car is mostly outside and is currently irregular, but basic, clean! Unfortunately, I don’t know very well about wax and other care products and there seems to be a huge amount of information in the forum that I am a little beaten up as a layman. I would like to pass that car to a professional, from me also private, d it takes care of itself then. Unfortunately I haven’t heard anything big here, except the usual 0815 conditioners who look after the car dealerships as subcontractors. If someone has more detailed information I would be happy. Would also be ready to take the car a bit away for it. So something like Düsseldorf etc would be ok. To the car I can possibly still say that there are one or other smaller not particularly deep scratches but otherwise the car is in a “normal” Zu The car is ONLY in series, but will be modified a little in the near future.