Firstly,
You should know about yourself you are a trader or investor. If you a trader then what type of trader you are?
Intraday trader or Positional trader, If you are a trader then you will have to choose stop loss and target in your trade. The averaging concept does not apply in trading.
So you need to choose the best stock for trading purpose. It can be cash or f&o stocks.
If you are new in the market then you should take a demo account. After 1 month you can trade in the stock market.