It is not something that anyone can just do without any practice. That means getting some time to practice out strategies is crucial for your success. There are two main ways of practicing: with real money and with a training account.
Training accounts are offered at some brokers. They give you some Non-default money that you can use to invest in any position you want. Then you can see the outcome of the position in real time and see if you would have made a profit. Some training accounts are time-limited, so take advantage of one if you have it to get the feel of the trading platform and try some unusual positions you might not attempt with your own money.
Real money practice is harder, because you need to know not to risk enough money to make a big difference. It is hard to fight the temptation to invest more in your testing, though. One good idea is to have a separate account at another broker and keep it low on funds. That way, you will be forced to trade small and you can test out new strategies there, not on your main account.