Very well explained by Ali Chaudhry Sahb.
Sister follow whatever Chaudhry Sahb has explained, but if you need further info about academies then explore this link:
Sorry couldn't post the link because of Reputation points, you can find it out in my Statistics. Or see Section: Tips and Experience Sharing there will be a thread named 'My stay at toppers Academy' explore it and read all the posts, it's important.
And what about CSSforum? isn't it the best academy? here you will find notes, recommended books, CSPs with whom you can discuss everything, even by personally mailing them, they are very sincere. Moreover, a lot of experienced senior members, best Moderators, everyone is here to guide you better than any academy. But still if you want to try an academy then try anyone. All are same in my opinion. And remember you will never find an academy like CSSforum. You will definitely come back here in the end.
Good luck.

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"Whomever Allah guides, no one can misguide, and whomever Allah misguides, no one can guide." Al-Qura'an.