Hernandez will join United's tour party in North America on the Houston leg on July 27.
And Reds reserve boss and Old Trafford scoring legend Solskjaer has his fingers crossed for the newcomer.
"Javier looks good. He is young and we hope he makes an impact on the first team," Solskjaer told the Manchester Evening News.
"I have only seen him in the World Cup but it was enough time to be impressed and excited.
"He looks very sharp in the box. He is quick and can finish with both feet.
"I like his attitude for finding space. He makes good runs for midfielders to thread the ball through. He is direct in his running. He looks a natural goalscorer.
"There are not many who can handle the tempo straight away in England so he might need some time. But he has great attributes.
"There are similarities with Javier and Diego Forlan with both being two-footed and quick feet.
"Size-wise they are similar and both know where the goal is."