How to buy Silver in Commodity or other Markets for Long term?

General
1

I’ve been reading and trying to fully understand the Silver chapter on Varsity, but have some confusions on how I can exactly buy Silver as a commodity or ETF for the long term

  1. Which ETFs have the least tracking error and are available on zerodha? How do I search and find them on Kite or Coin?

  2. Are there any other forms to hold Silver for long term except the contracts/futures etc? Are there any benefits or good Year on year returns on silver looking at historical data?