What are dual ailerons? All the airplanes I have ever known have two ailerons. Is this what you are calling the flaps, when they can also act as ailerons and are not "flapping"?

The use of a telephone might help you get in touch with an instructor. If at one of the fields and no instructor is there, ask the fliers there, who is a good instructor and if they can give you the instructor's phone number.

It is not law that you must fly with an instructor. Local clubs may have rules that this is how the process works for that club. The club you describe as not actually being a club likely has no such rule. Still, going up with an instructor is a good idea and if you can arrange it, I would do so, unless you have confidence in your abilities to be successful!