there is nothing to add to the answers that you got from LaRue and Jocelyn. Mine would have been identical.
But I understand that you want to practice, and there is one thing I believe you can start doing before you are certified: practice postural assessments. Ask people whether you can take their pictures according to the assessment modality of your PT exam and see what you can see. Or observe people’s gait and ask yourself what is out of alignment if you see imbalances.
Assessments are the cornerstone of any personal training, and they are both an art and a science. I have been a personal trainer for 17 years, and I still consider myself a learner in that field.
I wish you good luck with your exam.