The Navy Supply Corps are the business professionals of the Navy who take care of global sustainment in support of all Navy missions. Critical role. They are behind the “beans, bullets, and black oil” (food, fuel, ordnance) logistics management of the Navy as well as “stuff and money and food service.” They are a tight, professional community with a great network who never seem to have a problem finding a job in the business world, whether they do 5 years or 20+. They have sea duty as well as shore duty. They go to sea on subs, surface ships, carriers, as part of aviation squadrons, etc. Someone has to manage business functions. They are embedded in every aspect of Navy organizations and operations. A great career goal for you!
I am an OCS grad and my roomie went Supply Corps. She was a prior enlisted in a supply rating.
OCS is as highly competitive in its own way as USNA and NROTC. It serves as the adjustment valve for new officer output in any given year. If USNA or NROTC are running short of their goal, that will impact intake at OCS to meet overall new O-1 endstrength goals for that fiscal year. That means the Navy can cherry pick exactly who it wants.
And, you know what your service assignment is going in, unlike USNA and NROTC, where midshipmen create preference lists and find out fall of senior year. That also means there is a set number of Supply Corps slots available in any given year, and that will drive the yield goal for that community at OCS.
OCS is a crammed 12 weeks of all the Navy stuff - leadership, culture, seamanship, drill, etc. Lots of PT and inspections.
Strategy.
Academics. Kill it academically from semester 1. Perhaps take some tech courses as electives.
Fitness- Stay fit and perhaps find something like a club sport or intramural to join - same reasons as other commissioning sources, not just fitness but peer leadership, strategic thinking, time management, etc.
Leadership - Look for opportunities to join a club and take on a leadership position. Make a dufference. There may be a business professional group to join.
Medical - stay healthy - you will have to pass a physical, probably at the nearest MEPS. No recreational drugs, even a brief experiment, even if it’s legal in the state. . Don’t give anyone a reason to say “no.”
Don’t worry if you see “graduate degree preferred.” The Navy sends its top-ranked SC officers to well-known B schools.
Research your primary sources:
(Pay attention to the Supply Corps Career Preogressuin Chart)
Keep in mind the military fiscal year starts I October of the prior calendar year. So - 1 October of your senior year through 30 Sep after your graduation is the fiscal year you are shooting for.
I would speculate start of junior year is the time to do an initial reach out to an OCS recruiter to indicate interest and get on the radar. Officer recruiters are not found at the local shopping center recruiting office. Those are staffed by enlisted recruiters looking for recruits for enlisted service. Fine people but not who you need to talk to. There will be a regional Navy recruiting office for your area, the NTAG (Navy Talent Acquisition Group). The officer program recruiters work out of there. I met my OCS recruiter when he and another officer recruiter had a resource table at my university one day.
Since you are in FL, look for the NTAG in either Jacksonville or Miami. Not sure whose territory you are in. You gather your questions, and with your most professional manner, pick up the phone and call them, tell them you are a business administration major, junior, interested in the Supply Corps, who can you talk to? They are in the business of finding and signing high quality warm bodies. Be what they are looking for!
Finally, have some fun and google “Carl Liebert on LinkedIn.” Find the one who is currently an executive at American Securities. Review his work experiences. He is a USNA grad who went Supply Corps (he may have been NPQ for unrestricted line officer), did his 5 years of actuve duty, and went on to become a top business executive.
The community is affectionately nicknamed the “pork chops” for obvious reasons, which gets further shortened to “the chop.” And maybe because the Supply Corps collar insignia looks vaguely like a pork chop. 
