There are a multitude of orders, so even deciding on which one you wish to enter can be a long process. As noted in other answers, you may wish to explore that order by getting to know some of the members.
Keep in mind that acceptance is two sided; you need to determine if this order, or that order, is really the one you may wish to devote the rest of your in. The order also has to determine if they want you to do so.
I go to Mass periodically at the (not quite) local Trappist abbey. Recently on of the younger guys took final vows and about the same time, one of his confreres left; they both had been there a number of years. the other left because, after a number of years, he determined that the life of a Trappist really did not fit as well as he had hoped; and from all I heard, he was not “invited out”; rather it was his decision. In a way I was sorry to see him go (they are not a large monastery to begin with), and on the other hand, if it wasn’t fitting, he spent a good time discerning.
And don’t assume, if they suggest that you go to college, that any particular degree is “needed”, or another one is “not worthy”. Members of orders have degrees all over the spectrum. Just as you need to discern which order may be what you are called to, so with a degree. You may have talent in art, or business (they really do need business managers!) or zoology, or languages, and the list goes on. In other words, don’t presume you need a degree in theology (and that is not a put-down of such degrees).
Our new Archbishop has, if I recall, an undergraduate and a Masters degree in engineering. Not that he is in an order; just simply that you should not make presumptions as to what “they” need. In short, I agree that attending college is not necessarily a bad thing; it may be the best thing you do. It is entirely possible you may choose an order, go and start with them, and find, after a period of time that is not where you are really called. That is not to question that you feel called now; it is just meant to give a bit of perspective to someone who is most likely well over 3 times your age.
That, and I spent two years of college in seminary. Not where I belonged, and I would not go and do that two years differently were I to have the choice. It was awesome. Just not what I was called to do.