Coach Craig Stinnett believes that Alex Johnson is just starting to feel comfortable with his role on the Roseburg High basketball team. After Johnson’s performance against North Medford on Friday, that would seem to be an understatement. Johnson, a 6-foot-3 senior wing, lit the Black Tornado up from all over the floor on his way to a career-high 28 points in the Indians’ 53-47 Southern Oregon Hybrid win at Robertson Memorial Gym. Steady from the start, he went 12 of 15 from the field to lead the Indians’ 61-percent shooting exhibition. “He carried us,” Stinnett said. “I think he’s starting …