Hello, raedyn_l...Well, it certainly sounds as though you are very enthusiastic about ballet. I'm located in the US, so I can only speak to what I know of here. As you idolize ABT's Miss Corella, perhaps you are in the US, too!
I think that at your age, 16, five days of classes per week is not too much for you. This is what pre-professional dancers your age are doing and have been doing for a couple years already. I think you are saying that you have had no formal training as yet? If you want to dance, you need to find a good school. I believe that if you study at the above-mentioned pace with good teachers and
you have the physical aptitude for ballet and pointe, it is possible to be on pointe in three years. Because we can't see you, it is impossible to be more specific. Although it is
possible, it might not be right for you
...You must attain a certain level of correct placement, strength, and technique before any reputable teacher will place you on pointe. So, don't be in too much of a rush to get those shoes! It is probably too late for you to think about dancing in a major US company (like ABT), but there are many other opportunities to dance. There are many good smaller companies all over the country. Or, perhaps your dancing might lead you to musical theater, or to contemporary dance. You'll begin to see the possiblities and find your direction once you begin your journey, but it will take hard work and dedication to get to that point. However, if you truly love what you are doing, it doesn't seem like such hard work! That's how it felt for me, anyway.
Hope this helps, good luck, and happy dancing!