Paint care? What wax??

Hello together! I hope some paint and care professionals can help me further here? And I own a VW Bus T3, which I completely sandblasted, primed, etc. and then painted over last summer in the most tedious small work. At the moment it also holds “winter sleep” (and the paint can harden wonderfully). But how can I protect my paint in the best possible way or with which medium?Wachs should actually be completely enough with a “new” paint? If yes, welc Hes? Or a seal? Or a light polish?? Are there so many products! Sonax, Turtle Wax, Meguiars etc. Sometimes premium waxes for far more than 100Euro (are they really worth the money?!) In summer I like to travel with my bus 4weeks in the south, where optimal care is not guaranteed and the solar steeling is very high! Nevertheless, I want to protect the paint in this frame as best as possible…. Who has particularly good experiences with what means? How should I process the product best??? Other tips??? So that I am already well equipped at the start of the season! Thank you very much for every answer!!!! LG, Slash