Some people will advise learning the fixed wing first... other will advise starting with the heli first. I don't think it makes a lot of difference.

It is considerably less expensive to start out with a fixed wing model than with a decent heli. It takes about $350 to get a good trainer setup for fixed wing. It costs about $700 to get a decent setup for learning to fly a heli. Crashing either can be expensive, but the heli crashes are usually more costly than the fixed wing crashes.

For both, you need to learn about the visual orientation problems, and how to overcome them. When the nose is pointed at you, some controls seem reversed.

The skills learned for one will somewhat apply to the other... but there's some big differences, making the first lesson with the different type almost as hard as if you had no experience with the one you first learned to fly.

You will have fun with the fixed wing aircraft quicker than with the heli... the first bunch of flights with the heli you will just be learning to hold it in place about 6 inches off the ground. First lesson with the fixed wing, it will be WAY up inthe air, and moving along about 50 to 65 mph. You can do a loop with the airplane first flight, try that first flight with the heli and you'll have a BuNCH of tiny broken parts.