The most important thing to consider when starting in this field is which site to use. Here are a few factors I think about and which you should consider also. The first of these is the commission that is charged. This is a fee which is applied to each transaction and although charges overall have been falling the past few years there are a wide range of prices.
Some sites may charge a fee for charts and quotes you'll need to make your trading decisions but the better sites provide this information free of charge. Just be aware that this information brings no guarantees and does not tell you what you should do. What you get is the data and information to help you make decisions that turn out well in the long run.
Besides buying or selling stocks and awaiting the results of your decisions you'll find over time that online trading is a great educational experience. As you do your research into stocks and the companies behind them, you'll learn a great deal about the marketplace and the financial world and may in time gain significant expertise in one or more sectors of the marketplace. This expertise can help you succeed in the long run.
When I look back across my career as an investor I can confidently say, without any fear of being contradicted, that it has been both amusing and challenging. It may be a somewhat bizarre set of goals to have but if this is the sort of thing you are into then I would say that Trading Stocks Online is definitely the right sort of career decision for you.
Probably my most memorable event was picking a stock prior to its IPO and then watching the price multiply by tenfold in the first fifteen minutes of trading. I then took all of the profits out of this trade and reinvested in some emerging market trades which mushroomed beyond all my expectations over the coming months. Once I cashed out of these trades I was able to reinvest once again in some government bonds. And the beautiful thing is that I was able to do all of this from the comfort of my own living room.
Something that you should be aware of, however, is not to congratulate yourself too much when things go well and not to berate yourself overly if things don't go as swimmingly as you had hoped or expected. This will help you to keep an even temperament while you are trading and therefore keep making the most optimal decisions for a given situation.
One of the cardinal sins in investing in the market is that of falling in love with your investments. There will almost always come a time when it is best to sell a given stock yet many will hold on to it if it starts going bad, refusing to cut their losses or refusing to bail out of what is fast becoming a train wreck. I hope you will take some of these observations to heart as you embark upon your online trading career and I wish you well.