https://www.cmegroup.com/
Learn the contract specs (click the "trading" tab in the upper left)
The CME has some educational material you will probably find interesting as well.
What should you know?
Futures are highly leveraged and you can lose more than your investment. I would be very uncomfortable walking away from the screen with a trade on.
Trading in the three weeks prior to the end of trading in the contract gets funky; you will see a lot of large market orders hit without the expected price movement resulting. If you watch the time & sales/ Depth of market you'll see it.
Avoid having an open position prior to major news announcements. In my observations the order book (limits) will thin out in the minute or two prior to an announcement. The trading bots will take over and run the price up or down. If you wait five minutes after a news announcement you can get in on a great reversion trade most of the time.