How do I get started in stock investment and choose what co. iI want to invest in?

Just open a brokerage account at scottrade if you have $500 or at ameritrade if you have $1000.00

If you need help to pick your stocks drop me a line.

start reading up these books

Coffeehouse Investor - $10
Common Sense on Mutual Funds - $20
Random Walk Down Wall street - $25
Four Pillars of Investing - $25

I would agree especially with A Random Walk Down Wall Street, it is a great book, and is probably available through your library. I would also reccommend Naked Economics (not naked pictures of Greenspan, an overview of economics).

First you have to open an account with a Investment Broker, there are many. For me I choose online broker which has low commission.
Second use common sense to pick a company to invest, look around when you shop, find any business that you see which is making money or any idea that you think will get a hit in future, AND you understand what the company is doing, then invest in the Company.
For example I think everybody will have a cell phone in future which can communicate, access the web, watching live TV, as a navigation tool; and I see the Verizon stores are full of customers. I like the wireless business, so I buy Verizon.
Another example I see most of the computers have Microsoft Windows, Internet Explorer, Microsoft Office and other business application that I have to pay them every month, I figure they are making money, so I buy Microsoft.
Third I like the strategy of what Warren Buffett use, just buy and hold. Also part of my investment is Random Walk, since not many people can beat the market, so just buy the Market (any index fund) and hold so at least you won't behind the Market.

Here is a great way to invest.
www prospera-fund dot com
They are invested with several traders in stocks and FX accounts, (diversified).
There you can invest money to earn 10% a month compounded! After testing with 100.00 it works, and so I invested more, four different options, all 10% a month, "offshore investing".
Examples of compounding: 1000.00 after one year: 3130.00.
or, 200.00 after 5 years: 60,000.00
Do it, and forget it for 5 years, you'll not be sorry.

Source(s):

www.prospera-fund.com
refer. luckyrick

Easy answer -- go to:
http://www.goldrankings.com
Invest two or three high yield investments every month.