Converting to Catcher? Quick

The son was told that he will catch alot more this summer due to the fact that there current catcher is having knee issues. He caught in his first game and was thrown into the firepit as this was an AAU Frosh Playoff Game. He caught well, threw well( threw 2 runners out), but couldn’t block the plate to save his life. Can anyone recommend some good Catching Sites? It appears that the coach really thinks he can thrive at this position along with pitching. I am a bit skeptical but it drives me nuts to see him backhand balls off the plate like an infielder instead of blocking them!

At least the coach thinks he will do well,
instead of thinking the opposite.