Hi Greg and welcome to the Forum.
I consider myself an amateur even though I've been doing this as a hobby for more years than most could imagine. The one thing that I do know is that I can learn anything, even if it takes me a few tries to get it right. According to your level of acceptance of risk, you can can any of the vehicles you listed and start the learning process. I'll be honest and tell you that I would recommend a beater or daily driver and that you can bring back to life and truly learn on. The process is not that difficult, it just take time to implement and perfect the technique that works best for you.
As for which product to use that comes down to your goal or goals. If all your vehicles happen to be White, I would not even recommend ceramic or graphene, but would recommend H20 Guard and Guard. I have yet to find anything that can make a white vehicle look as good as what HGG can do. If your vehicles are black, then that requires a whole different discipline, between the daughters Jaguar and the Roush Mustang, the were closer to a punishment based on the amount effort, but they sure did look great when done. Both of them ended up with Ceramic on them, one Ceramic Spray Coating and other Ceramic Wax
Give me multiple Red vehicles and there is no doubt that they will have Ceramic or Graphene on them. All of my Red vehicles currently have Ceramic Spray Coating on them and going forward they will have Graphene. Even the body parts on the motorcycle are ceramic coated and in case you are wondering, yes it is Red. The application of the coating is very easy, it is the preparation of the vehicle that requires the attention to detail, effort and commitment of time. There are some excellent video's on Adam's Youtube channel and I'll recommend checking out some of them to get an idea of what is involved.
Beyond that ask questions, there are many helpful voices on this forum.