I run Normal tempo unless my opponent is much better than me, then I run Slowdown. I never run Uptempo. I play 0 balanced unless my opponent is not good from 3-point land, then I run -1 or -2. I never run +. Your team is doing very well in causing your opponents to foul and turn it over. An improvement in shooting % will come, as pumphead said, with conditioning and IQ. Included in Conditioning is Stamina which is very critical in both FB and Press. In the 2nd half of Game 1 at one point you had all 5 players on the court playing at Very Tired. In Game 2 most of your players were Tired or Tiring in the 2nd half. This causes performance levels to drop dramatically and likely was a significant factor in both of those games.
You have only played 3 games so far and 2 of those games were against very good teams. Your opponent in Game 1 is ranked #17 with 3 Sr, 3 Jr, and 2 So. Your opponent in Game 2 has 6 Sr and 6 Jr. That experience far outweighs your 6 Frosh and 1 Soph. Your opponent in Game 3 for some strange reason is only playing with 7 players but discussing that would require a brand new thread. lol. My suggestion is to scale back to Normal and 0 balanced and just be patient until your guys grow a little more.