Caleb Williams got a jump start on the Chicago Bears’ offense, according to ESPN’s Jeremy Fowler. With rookie minicamps underway, the No. 1 overall pick out of USC wanted to get acclimated ahead of taking the field. Fowler reported Williams worked with his personal quarterback coach to get the intricacies of the pro offense down. It was a stark difference from Lincoln Riley’s offense at USC and Oklahoma over the last three years. “He’s been getting acclimated in the offense, I’m told, for a while now,” Fowler said on SportsCenter. “His personal quarterback coach, Will Hewlet out of Florida, sa…