Beginner’s question about new BMW 5er 2017 paint

Hello everyone, I’m a freshman and I’ll get my new BMW 5 in SophistoBrilliant effect painting in the next few weeks. When the car comes from Munich, what do I take as a seal? I confess for reasons of time I will drive through Mr. Wash about every 3 weeks, in between hand wash. I don’t want to deal with the paint every three weeks, but I want it to be protected for as long as possible and shine nice. I know the cracks among you now I thought about a good sealing, investing time, then a good detailer that fits in between. Is there something like that? I’ve read here for several days, now I don’t know anything anymore. VG Thomas