What kind of parking aid for a station wagon?

Hello, we will soon have a new (used) car due. It will become a combo of the category Octavia/Leon/Golf/Focus/etc. Previous car: Audi A4 B7 Limousine – soon this will be the second car. I have to say unfortunately, I can’t even park in smaller parking spaces backwards to the right with the approx. 4.60 meter long A4. Even if the car is behind me safely still 2 meters away, I don’t see where the car starts behind me (so disappears down) in the rear window), still where the Audi stops. I don’t know if this is easier or heavier with a station wagon. Of the length the cars take nothing, for example the Octavia is still 7 to 10 cm longer than a station wagon. But even to the front I don’t see where the car stops – it can be more easily estimated. I also have no exercise and there will be no exercise to it. Home parking space, supermarket parking spaces to park forward/backwards, work has parking space, The Audi A4 has nothing to do with parking aids, i.e. not even parking piesters in the back and we (my wife and I) have never had a car with any kind of parking aid. Therefore, my question, which technology one comes with some of the regular destinations have parking spaces or it is somewhere in the country with a lot of space. Is the rear-view camera a major advantage? Or is the 360° round-view camera even better? Self-directing system? It is only about the rear-right parking in narrow parking spaces in the city. With little practice and there will not be any practice, because I only have to do it very rarely. Close parking garages, narrow parking spaces to park forwards/backwards etc. pp. are no problem. But whether I have a meter to the rear car or 10 cm – I don’t know (and I don’t see it either). Whether I just come by while steering in front or if there is still a lot of space, I don’t have a feeling for it and I don’t see it either. Are there normal parking beeps in front and back sufficient, can you rely on them completely? Or are the further systems already in advantage?