There are many 5-year MSOT programs. These combine your undergraduate and graduate degrees together. If you are already in college and can not transfer into a 5-year program you will have to finish school and then apply to either a 2 or 3-year MSOT program. You can also apply to OTD program that varies from 3 or more years. The AOTA and NBCOT websites are great places to start your search and will let you know what programs are certified. Good luck!