That is a tall order and many books have been written about it. Read them. Beginner books you might consider:
David Nassar, Rules of the Trade
Josh Lukeman, The Market Maker's Edge (the title based on marketing purposes, no dout, but still has some good basic information)
Dr. Alexander Elder, Trading for a Living, is something of a trading Bible.
Can probably pick them up used pretty cheap on the net.
I suggest you paper trade and see how you do. Paper trade simply means you mark the price paid, price sold, and profit and loss in a tracking system. Be honest in this system, or it will do you no good. This is most easily tracked for swing trades, i.e. you buy or short one day and sell or cover either the next day or next few days, weeks, etc. You can also paper trade day trades, i.e, you buy and then sell in the same day, you just have to do more to track them.
You can get demo accounts with a number of brokers if you want to see how the trading software looks and handles without risking any money.
Cybertrader has a demo. Try it. They are one of the top 3 or four brokers out there, but you have to trade actively to avoid paying steep trading fees for software and data. I do not suggest them as your broker to start, but later, say in a few years after losing money, when you start to really figure it out and hopefully in the 3rd year you start to make money, you can switch over to them.
If you want to track a series of portfolios over time, Yahoo Finance is quite good for a free site.
Watch Bloomberg TV and or CNBC, and listen to Jim Cramer on his radio show. This has to be done simply because so many traders do so, not because they have anything critical to offer (though sometimes they are pretty good). For a beginner, they introduce you to the language and news focus of traders. If what they talk about is confusing to you, then you are not ready to trade. You need to do more research and reading.
If you insist on buying and selling right away, make sure you are aware of chart performance of the stock and any pending news events such as earnings releases. Big moves happen on earnings releases, and sometimes you get rewarded and sometimes killed. See what happened to ERTS and WFMI on November, 3, 2006, for example. These moves started the previous night after the companies reported earnings and made forecasts.
I should mention that the current time frame strikes me as rather problematic for starting a trading career. Not saying the market is going to go down, just saying that it has gone up pretty strong on a good but not great fundamental backdrop, which is why I am almost 100 percent daytrading now, rather than swing trading.
Could fill a book with this stuff, but that's a start.