Go to your bank, ask to open up something call a direct investing account. You must have an online banking account and once logged into online banking. Click on the investing account and once on investing account, there will be an option to buy stocks and you must enter the ticker symbol, quantity and press buy.
Good idea to invest in stocks. For stocks, you should have knowledge about share markets and rate of stocks also. I suggest you take help of some financial expert like JM Financial group.
Check out computershare.com for all the info you need unless you are talking about the wooden one's they used to put people in. In that case you are a couple of hundred year too late,
go online and search for stocks