For stock trading, we need 3 accounts, Savings account with Bank, Trading account with Broker and Demat account with CDSL/NSDL where all 3 will be linked with DP id.
We can buy/sell the stock through the online platform provided by brokers. Trader should maintain the adequate fund in the trading account for the trading. We should have the knowledge on the technical analysis which required to choose the right stock at the right price. Trading is a good business only with the proper analysis and calculating the reward ratio is greater than the risk.