There is always the exception to the rule, I learned to ride on an Arab and I love the breed, but I agree that it is probably a good idea to stay away from Arabs in general. But don't rule them out completely. You may be surprised.
Getting your first horse is a very exciting experience. I learned so much just through the process of finding my first horse. It's very good that you are bringing your instructor along with you. It is VERY important that when you go to look at a horse you do your best to leave your emotions behind. That sounds kind of cold but I'm telling you from experience, your emotions can get you into a lot of trouble. Don't buy a horse just because you experience the "Love at First Sight" syndrome. I did that. I ended up with a horse that was abused, untrained, and frightful. I loved him very much and he taught me a lot, but I only was ever able to ride him about seven or eight times, I fell off twice, and the last time I broke me arm. Even though I still feel like we had a special bond on the ground and I loved him very much, he was not a good choice for my first horse.
Best of luck to you. Keep us posted on how things go.