If you are talking about trading the emini futures I do not think there is a choice. They are each listed on one exchange only, I believe. But maybe I am wrong? https://en.wikipedia.org/wiki/E-mini
Try cmegroup.com: The CME website is full of good stuff. The "education" section is very interesting.
India futures market is booming, it's overtaken the U.S. volume. The Niftybank futures does several fold of the ES (SP500) volume. India has single stock futures on most of the more actively trade stocks, unlike the U.S..
Why are all replies related to futures trading (CME, NSE)? The question is posted in the forum section called "Crypto Assets".