You have already been provided some great information. I have gone through the steps similar to your situation. Here is my recommendation.
This summer, either go to your library or purchase through Nolo.com the book
Patent it Yourself by David Pressman. Read the first few relevant chapters.
Read through the patent process.
http://www.uspto.gov/patents/process/index.jsp
Search for your concept through previous patents on the USPTO website.
http://www.uspto.gov/
http://www.uspto.gov/patents/process/search/index.jsp
http://patft.uspto.gov/netahtml/PTO/search-bool.html
First look through the drawings to see if each patent is close to your idea. Then read the claims of these patents, observe how similar concepts to your idea are described.
Learn the difference between a
Utility Patent and a
Design Patent.
Read about the different types of patent claims.
http://en.wikipedia.org/wiki/List_of_patent_claim_types
First, learn about the
Means-plus-Function claim type since it is the most logical method of writing a claim. Then learn the
Jepson claim type since it is relatively easy and logical. Then learn about the
Markush claim type since it most used in practice by U.S. attorneys as a technique to better protect the claimed aspects of the invention through confusion.
Do what you can to start writing your own claims. The book referenced above by Pressman provides excellent advice for how to start. Take some digital pictures of your prototype (keep these secret). Also make some rudimentary drawings if you can. At some point, you will need professional drawings either hand drawn or by Auto-Cad. You may have the ability to create these yourself.
Then prepare the rest of the application, again the book with guide you. Assuming you proceed with a utility patent...
When you have this initial work done, put everything together for a
provisional application. For a provisional application, you may write more claims than necessary. I like to write a short and concise set of claims followed by a more verbose set of claims that claim the exact points as the short and concise set, just more thoroughly described.
Now that you have a provisional application prepared you can either submit it to the patent office yourself or send it to someone you trust for review, such as your patent lawyer uncle.
Once your provisional application is submitted, you have one year to submit the formal application. You will want to provide your provisional application to a patent attorney or agent to clean up for you quickly so they have as much of that year to work on this as possible.
Get started reading that book in the first week after classes end. This work will take all summer to complete. Good luck with it.
You may have a strong desire to discuss this with other people. I advise against it. You may say you have an idea that you are working on but do not provide more information than that. The topic of patents get people excited. Your friend or family member may take your idea and excitedly discuss it with others. There are many qualified people out there that upon hearing of your idea, can act on it faster than you are able.