Good morning :)
Writing is not a linear process; with that said, it is very difficult to start at the beginning and work strictly to the end, as if you were driving from point "A" to point "B". You have some good base information; I suggest forming an outline that you can fill in as you progress. Remember when you are writing, the main point is to impart information to your audience, not to make nonsense look good. Here is a suggestion of what I mean:
THESIS STATEMENT/TOPIC SENTENCE (SAVE THIS FOR LAST)
I. MAIN IDEA/CONCEPT 1
A. FACT/SUPPORTING DETAIL FOR MAIN IDEA/CONCEPT 1
i) RESEARCH SUPPORTING FACT/DETAIL/MAIN IDEA/CONCEPT 1
II. MAIN IDEA/CONCEPT 2
A. FACT/SUPPORTING DETAIL FOR MAIN IDEA/CONCEPT 2
i) RESEARCH SUPPORTING FACT/DETAIL/MAIN IDEA/CONCEPT 2
REPEAT THIS PATTERN FOR THE REMAINDER OF YOUR CONTENT
CONCLUSION/WRAP UP
The main topics are the pillars of your essay; they are the supports, the main things your reader absolutely must know from your essay. Don't assume your audience knows anything; taking their knowledge for granted will lead you to leave large, gaping holes through the thoughts in your essay. Writing is a process of concentric circles; start in the middle with your main thoughts, then work to each fact/supporting detail, and then bring in your research; once your body is complete, wrap it up with a short conclusion, and save your thesis statement and introduction for last. After all, how can you write a thesis statement for a paper that hasn't been written yet?
During your rough and 2nd draft, don't pay much attention to grammar, spelling, etc.; concentrate on getting your thoughts and good information worked in. Also, don't worry about your length right off; as you go along you will find more interesting research and anecdotes that will "beef up" the body length. Use time to brainstorm and envision where you want your paper to go before you ever write a word. Save all of your mechanical concerns for the very end.
I hope this helps you get started; feel free to post as many times throughout this process as you need.
Regards,
Gloria
Moderator, EssayForum.com
Gloria, EssayForum.com