Trading silver is mostly the same as trading any other commodity on the futures market. All that is required is an account with a commodities brokerage, and some trading capital. You will definitely want to familiarize yourself with the market for silver so you know what factors affect the price.
1. Open a brokerage account with a futures brokerage. Each one will have requirements for how much capital you must have in your account.
2. Learn about the silver market. Silver differs from gold in that it has many industrial uses, and it is not seen purely as a store of value. Educate yourself about the particulars of the silver market so you know who the producers, recyclers and customers are.
3. Place trades. Once you feel you know enough to start risking money, it's time to get into the market. Most traders recommend sticking to your system, and never becoming emotional.