Index funds should be invested based on risk appetite like large, mid & small cap TOR :
Low expense ratio
Low tracking error
Big AUM number
Large-cap is more risk proof followed by mid & small so the amount should be distributed in large & mid cap or in Indian index fund & global index fund.
You can Google for the platforms through which you can invest in index funds. To put it straight your broking platform should provide you with the feature to invest in index funds or go to the mutual fund website.
Platforms give aggregated access, but there are no free-lunch - so one must be giving something directly or indirectly, at least a database of investors to that platform.
Remember that participation in direct equity is the best option. If you do not want to get into it then go for a qualified fund manager who manages accounts at just 1% a year fees.
You can check our best-performing bank nifty option tips here and get benefitted like other clients who have reposed their trust in us.
Index Funds
1. Edelweiss Nifty Large Midcap 250 Index Fund. Relatively new. Considers 50% of Large & Midcap stocks and reviews every quarter. Expected to do well. It Covers Large and Midcaps. Unique. No other fund like this in the Index.
2. UTI Nifty 50 Index - Evergreen
OR
HDFC Sensex Index - Evergreen
Choose either between UTI & HDFC.
3. Mix of Active & Passive is always good
Index Funds are easier / simpler to invest and redeem. For ETFs, you should love trading and be an active daily player.