Welcome to SMC!
In order to trade before market open you have make an agreement with your broker for pre-market/after-hours trading. However, be aware this doesn't necessarily mean you're going to "get a jump" on a stock. Often the price rises during off hours only to come crashing down when the market opens.
If this is your "big plan" to make money in the market, you're mistaken. There's no magic method. It takes hard work and education to make money.
Good Luck!