Before you consider investing in a single share I would strongly recommend you read and read for about 12 months! If you could start with the following, if you have not already read them:
http://www.amazon.com/dp/0471445509/ref=rdr_ext_tmb (Common Stocks and Uncommon Profits and Other Writings)
http://www.amazon.com/The-Intelligent-Investor-Definitive-Investing/dp/0060555661/ref=pd_bxgy_b_text_y (The Intelligent Investor)
http://www.amazon.com/Security-Analysis-Edition-Foreword-Editions/dp/0071592539/ref=pd_bxgy_b_text_z (Security Analysis)
http://www.amazon.com/Little-Book-Common-Sense-Investing-ebook/dp/B008W02TIG/ref=sr_1_3?s=books&ie=UTF8&qid=1415815158&sr=1-3&keywords=common+sense+on+mutual+funds (The Little Book of Common Sense Investing)
As a general rule, beginners are recommended to stick with Large Caps as the the tend to be less volatile than Mid Caps and Small Caps. And it this respect your big names are not Large Caps.