Are you deliberately trying to mock teenage speech? If so, you're moving in the right direction. If not, I'd like to suggest that you start using the phrase "want to " in your writing instead of "wanna". Wanna is atrocious English and makes you sound like a thirteen year old on a teenage chat board :)

Hello Marcia, I am glad you are setting goals and making plans to on how to achieve those goals, here are some suggestions I have for making your paragraph grammatically correct. What are your goals and how do you achieve your goals? First, you need to know what you want to do, in my case I have just now discovered that I want to work in academics so I have been following a schedule of taking three classes per week so that I can successfully pass an exam to enter university to begin my Masters Degree. Discipline is everything! I believe the keys to success are discipline, focus and persistence; nothing comes easy!

Suggested correction: First, you need to know what you want to (would like to) do. In my case, at this time, I discovered that I want to work in an academic area, so I've been(or I have been - more formal) following my schedule to study (study for? or attend?) 3 classes per week because I want to take an entrance exam for a Master's Degree program at a university. Discipline is everything! I think that discipline, focus and persistence are key to success! Nothing comes easy.

May be you are right. As for me I am learning English to pass the IELTS and apply to good university.Thats my target!