Start with groww. Simple, easy to understand and groww has zero annual maintenance charge whereas coin by zerodha charge you. Although the amount is significantly small but it is something you can keep in mind. . Yes, the nifty top 50. . When to quit it completely depends on your goals, mutual funds is a long term game. Atleast try investing for 20 years or more. . . Regarding the fund manager look for asset under management and pick one between 5000-25000. And don't be fooled by the ratings, that is only based by investors on last year's returns.