The Arizona signee has been one of the top performers so far at McDonald's All-American Camp practices, where he's showcased his strength, defense, passing and scoring ability.
Johnson considers being in Chicago for the McDonald's All-American Game the perfect way to end his high school career.
"It's a blessing to be here," Johnson said. "Everything I've prayed for and wanted out of high school, I've gotten so far. This is like the ending chapter to my high school career so I'm trying to make the most of it."
Being amongst the best players in the country, competition for playing time on Wednesday is stiff and Johnson has done his best to stand out in practice.
"Everyone here is trying to play so I'm doing what I can by hustling while also doing what I'm best at to contribute," he said. "I'm really happy to be here and compete with these guys."
Johnson is fresh off another state championship at Mater Dei and considering his team went undefeated this year, it's hard for him to look back at his senior year with too many regrets.
"It was magical," he said. "We conquered every problem and never had any excuses. We gave all we had to the program every single game. We played with no regrets and just did it."
The biggest improvement in Johnson's game this season was his vision. He played a lot of point guard for Mater Dei this season and as he became more comfortable with his new position, his passing ability really improved.
"It's just seeing the court from a different view," said Johnson. "Playing point guard I got a lot better at reading slips and viewing different angles. It's just viewing the game from a different way and I feel like it's made me much better."
After Johnson finishes his week in Chicago, he'll then prepare for the next chapter of his basketball career at Arizona, something he's already looking forward to.
"I think I fit in well," Johnson said. "Depending on who goes pro, they'll have me playing the two and three. I like getting the ball in space and I know I will next year. I'm excited to get on campus; it's going to be fun."