Depends how deep one gets pulled into Quixtar. If you treat it like an IBO and actually sell product's and try to sell people on the venture, then you may have eliminated some of the shakes of approaching strangers and working with people. You may have developed a bit of salesman acumen.
As far as running a business, you'll still be handicapped. Quixtar is a subsidiary of a larger MLM and on top of that it engages in MLM itself so the underlings involved NEVER see the contextual business running nor does one own it. It's like buying a Mc Donald's franchise, you're acutley aware of McDonalds business(what they are willing to let you run) but that doesn't translate well to creating and being responsible for your own venue. Now if you started, funded , owned and operated "My Burger's, Inc" you will be fully prepared for a basic level understanding of how a business can run. It's not hard, you just need to experience the vacuum of responsibility. Most people cannot take it.