Watch and observe. It's a lot of information to take in, so do not rush yourself into it. Let it all come to you naturally. Paper trading, using simulator and small shares will acclimate you to our techniques and pace. Call your broker for their requirements.
Considerable variation exists among trading houses.
Minimum size account can vary from 2K to 25K for different brokers. We recommend you to have at least 25K to get started. And remember, that preserving your capital should be your main goal while you are learning. Make sure you have enough money to live on during the learning curve especially if you have no other sources of income. Don't count on trading capital to live on.