Hey Alfa,
I have been learning 3dsmax for a little while. I would recommend going to your local library and search for books on 3dsmax there. I have found a few that have helped. Also, check on amazon.com for used books (cheap!) covering the subject. I recently purchased a used book called "Advanced Modeling in 3ds max 5" for $8 delivered to my door. There are also numerous online resources like 3dcafe.com. Just try google.
Overall, my best advice would be to get yourself a book on the fundamentals of 3dsmax so that you learn exactly what each tool is used for and when it is best to use it. Also, don't forget that modeling an aircraft is a very daunting task (for a very high quality model) and can be very time consuming. That being said, it can also be very rewarding to see your finished model - knowing that you can animate it, rotate it, etc even put it into a game. You'll most likely need to learn to make textures (skins) for your model too.
Anyways, I recommend starting small and simple, then gradually increasing the difficulty level to more complex things. I started with handguns and missles before moving on to harder things. You're also going to need to find 3-view drawings of what you want to model. With any luck, these 3 views will also include dimensional measurements. For cars/aircraft/tanks, my best experience has been to buy a scale model, scan the 3 view drawing that comes with it, then use that in the viewports of 3dsmax as a reference for building the 3d model.
There are some online resources with 3-view drawings but I can't think of any off hand. For the most detailed drawings, get yourself the scale model like I said above. Anyways, I hope this post has been informative!
:icon_jook
-Jack