Some people are using the simple airplane sample as a hands on, actual sample. Then you modify it like a template. Copy/paste/rename all files in it. That might take you a day to 3 days to figure out as there are tons of things that need to be carefully edited.
The Cessna 152 model XML's (note, interior and exterior models) will have the 'behavior' animations codes to get you started. Then you need to learn how to find those in the Asobo files Behavior XML's in your simulator.
I use other planes in the sim, like the Cessna 152, 172, SR22 (though its DRM and missing files), etc, etc, to study.
You will need to learn how to create a 'Developer Projects' folder and how to activate your project plane each time you test it in MSFS. It will be located outside of your sim in a projects folder (anywhere) and you click on the Open Project/project xml and your plane shows up in the airplanes folder. You can 'resync' to get it going each time you make changes, but its shakey. Sometimes its best to reboot the sim.
You will need to resynch your project files each time you make changes, even to one file, like your system.cfg or your plane model.
So much... but for now, that should help get you going.
This is the Asobo Behaviors center. Learn to flip through these to find your 'Behaviors' or find them in planes already copy-able in their model XML's. Good luck on that. Its so very complicated on copying out sections from here, from the Behaviors XML's. If you can find it in planes, it is a copy/paste deal. From here, you need to edit them to go into your plane model XML. You'll see.