Here is what to be careful of:

When you turn with ailerons, you bank the wings and pull the nose around with the elevators. To tighten the turn, use more aileron and MORE ELEVATOR!

Too often I see beginners try to tighten a turn by just adding more aileron. This causes the plane to roll over onto its back - now it's inverted and they panic and pull "UP" which brings the plane straight down.