Agility is great fun! And very addicting. Although at this point you don't think you want to compete you need to make sure you get instruction from people that do. For the simple reason, that places that offer 'just for fun' agility typically have little or no training themselves. First and foremost it is a safety issue and you don't want to scare you dog which can happen even with the most confident dogs.
The other main reason is, training with qualified instructors using regulation equipment, training will go faster. At first you may think it is slow but the end result is getting around a course with success and no frustrations on your part or your dog's.
And in the event that you change your mind, you will not have wasted your money or time. It is very common for someone to start in a 'just for fun' agility and decide they would like to continue with some more serious training......sadly they have not recieved the proper training and skills that should have been taught from the beginning and the result is having to training longer and spend more..........
I often have students that start agility classes with no intentions of competing, but change their minds later
Questions you should ask any place is:
Where do they compete and to what level (Masters/Excellent) and do they compete to a National level etc?
Do their students compete and Title?
Do they continue with their own education? If so, how? Seminars/Workshops/regular lessons? And who do they get instruction from?
Simply put even the top trainers continue with their education so they can be at the top of the game and be currant with the latest methods.
Good luck and have fun!