Certificate 3 and 4 in fitness, personal training, need help?

I'm currently doing my cert 3 in fitness and start my cert 4 in a few months, I'm 16 and the only problem is I'm finding it so extremely hard to understand everything and all the terminology. I'm the youngest in the course, everyone else is anywhere from 20-60. I really want to be a personal trainer... show more I'm currently doing my cert 3 in fitness and start my cert 4 in a few months, I'm 16 and the only problem is I'm finding it so extremely hard to understand everything and all the terminology. I'm the youngest in the course, everyone else is anywhere from 20-60. I really want to be a personal trainer but the work and assignments are so hard I just can't keep up. What do I do! :(
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