The video link above will help you understand proper form.
It's not too early to be thinking about Summer training. Cadets must complete Recruit Training (RT) to qualify for any other training.
Remember that training is only one part of advancement in the program. You still need to complete your required coursework. If you have any questions about what you still need to do to advance, talk with one of the adult leaders at next drill. The goal is for every cadet to advance as soon as possible for each rank.
LTjg Marc Russon