Well, it's going to be a lot harder for you than it would be for an adult, and honestly, no, there will be some people who won't take you seriously. You'll have to work harder to become a successful author and to get the respect that you deserve, since people tend not to expect 14 year olds to have the skill that it takes to write something worth publishing. But don't worry, it's not impossible. If you worked so hard to write your novel, and it's that long (wow that's pretty dang long!), then I'd say go for it!
I also feel the need to mention that when I read your question, I did gain a little respect for you, just because you had spelled all the words right in your question and written in complete sentences (you know how rare that is here.)