Williams has in fact taken an early first step.
A few months ago, Williams had a list of about ten schools he was considering. He now, recently, trimmed that list to six: North Carolina, Kansas, Duke, Arizona, Washington and Oregon. Williams said that there is no favorite among those six and he's still wide open among those schools.
High school juniors, according to the new NCAA rules, will be able to take official visits beginning in January of their junior year. Williams has indicated that he'd like to his official visits very soon and possibly make a decision by spring.