Glad to see you're getting into Orbiter so fast!
If you want to make an addon, I'd recommend you download some tutorials for it first - there should be some in the "Recommended Tutorials" section of the website (I think that's located under the "Quick Links" bit. I'm sort of in a hold on my first addon until I can work out some issues with it, and get a bit more schoolwork done, but hopefully I'll have something out within a month or two
If you want to make an addon, I'd recommend you download some tutorials for it first - there should be some in the "Recommended Tutorials" section of the website (I think that's located under the "Quick Links" bit. I'm sort of in a hold on my first addon until I can work out some issues with it, and get a bit more schoolwork done, but hopefully I'll have something out within a month or two