You can train to work in a pharmacy alongside a pharmacist by attending a pharmacy technician training course.
Pharmacy techs perform many of the duties a pharmacist may perform, other than advising patients or dispensing drugs.
A Certified Pharmacy Technician is someone who has received some training and passed the ExCPT or PTCB certification exam.
You may find a community college or technical school in your area that offers these courses or you may locate an online program.