I don't believe anyone could be a Professional in a short time. It takes ages to learn something. But yes, After Effects is an Software, which you can learn by checking some Tutorials. But no one teach every single Presets/Effects/Techniques available in it. They are limitless, you can learn it by doing self research on it. Self research is an interesting thing, which I believe you'd like. So play with the Software, checkout all the things which you don't understand. and you will be professional very soon. :)
Just keep learning. :)
Got your comments, thanks a lot!