Thank you both so much for your advice. I appreciate all the help I can get.
I have been studying and reading up on parrots everyday for a few months now.
It was just my biggest concern with an amazon especially because I really heard horror stories about the time during sexual maturity. It just scared me . I would be working with my bird, training and spending lots and lots of outside cage time with it.
That is good, but also remember that there will be many years prior to puberty and it can be easy to start some bad habits. Even a well-socialized, well-trained bird is not immune to the changes that adulthood brings (new rules, new hormones, new motivations)...So just because you do all of that does not mean you will avoid aggression etc in puberty (it can be rocky, or it can be hell, but even the best owner can experience either). Regardless of puberty, adult birds are more challenging than babies.
Also, you DO want to teach your bird independence and not set a precedent of interaction so high that they expect it forever (unless you can maintain it). You want to make sure your interaction is sustainable, and a lot of interaction is needed, but you don't want to start off super high and then reduce significantly (which is easy to do when life gets in the way)--the bird won't understand.
Ultimately, ALL birds as adults are louder and not nearly as sweet and cooperative as they were when they were babies...Yes, puberty is particularly bad among parrots in general (as it is in many humans--for some, it is worse than others) BUT, an adult human will never be a sweet, squishy, non-opinionated baby again, and much like a human, bird's behaviors, interests and preferences DO shift (regardless of puberty itself). You also will not be able to "snuggle" an adult bird without stimulating it sexually (even though your bird may demand this kind of attention if you set the precedent when the bird is a baby).
If having 1-3 years of very bad behavior scares you, then you should consider that there is no way of preventing the possibility altogether (not even for the perfect parrot owner)...As AmyMyBlueFront said, he loved his bird to death, but it got BAD. It sometimes does get bad and it can test your bond, so if these potential issues would be a deal-breaker for you, you should keep that in mind (because no one can know how your future bird will react). The "horror stories" you have heard do happen. Now, is puberty always a living hell? No, but it is still rough. There is no way to know whether "hell" will happen to you or not...Plus, at the end of puberty, you always will have an adult bird different from the baby you brought home.
Bottom line- If you knew 100% that your future Amazon would have a really bad 1-3 years filled with random aggression, intensified screaming, and a generally bad attitude during puberty, would you still want to get the bird without a doubt? If your answer is yes, then I would say continue researching/considering a large bird etc, but if you aren't sure, then I would suggest a change of course (because what you will end up getting is going to be a toss-up). Obviously no one wants to think about the "worst-case-scenario", but if you aren't mentally prepared to deal with it (in the event that it does happen) that is not fair to the bird.
Have you been bitten by a larger bird before etc? I ask because if you haven't you may find that it is more or less upsetting than you anticipate (not that biting is the only problem during a hormonal spell).