Look at Gold, you can trade it using CME Futures (GC contracts) or Forex (XAUUSD). It is very predictable while using technical analysis, as for me Gold charts are more "freindly", than Crude Oil. You can also try to understand it`s fundamentals in connection with general market mood and behaviour.
I think it is simple that Gold is the obvious option that you prefer to trade on when it comes to commodities. However, my preference is more to do with currency pairs. I feel it is easier with USD GBP prediction, it helps me with trading better. But not just this pair but many others as well. If we can work around forecast and predictions from experts, and also good money management then we can make good money!
gold is the first choice while trading commodity and can trade by using different methods like compare it with usdjpy commodity reports technical, use adx it works good ......etc
One thing that defines commodity traders is; they usually select just a few commodities, based on their tolerance for risk, available capital, and professional knowledge. The actual trading of commodities involves more than dabbling in the stock market, so be prepared to devote some time to educating yourself not just on the commodity itself, but how it moves within the market