Hello Harvey
Your welcome. I am sure you will have a good start; nevertheless be prepared for more!!! Having the model is only a small part before you enjoy the final result within the simulator. I am going to enlist
my overall steps in the creation of an aircraft:
1.- Design and create the textures for the "parts" or systems in your aircraft (i.e. fuselage, wings, stabilezers, propellers, etc.)
2.- Animate the moving parts (i.e. doors, propellers, levers, landing gear, etc.). Each Flight Simulator (namely FS9, FSX, P3D or something else), has its own rules; since you did not mention the simulator on which your aircraft will operate, you will need to follow what is stated in the pertinent SDK (also known as Simulator Development Kit).
3.- Design your gauges! It's not enough to have a beutiful model. It will need some screens, needles and other kind of gizmos!
4.- Create the flight model.
5.- Adopt or create a sound system.
Of course, you are about to begin the step 1. As I said before, be patient and come back if you have more questions.
Happy modeling and don't forget to have fun!
All the best in your learning courses!
Sergio.
P.S. If you want to read something related to your questions, take a look at this thread:
https://www.fsdeveloper.com/forum/threads/where-and-what-to-begin-with.439235/