When a trainer does stall, it recovers quickly and with little control input from the pilot. A trainer takes very little altitude to recover. Trainers are stable and tend to right themselves. This stability makes the trainer easier to fly and smooths out mistakes. Performance Trainers are slower than other aircraft types.
Lower speed gives the student pilot more time to think and react.
P-51 Mustang for your second plane. You and your instructor will be glad you did. When deciding what airplane you want, you need to know what engine to get. Sport planes usually need a displacement size from the middle of the recommended range. Many aerobatic planes use the biggest engine possible which necessitates more throttle control from the pilot, but can result in better aerobatics.