If you go into the Surface Warfare community after commissioning, your first job is learning your assigned position on your ship, understanding your various duties, becoming a proficient watch stander and working on your professional warfare qualifications to earn your SWO pin. Taking care of your sailors is 24/7 duty and at the top of your To Do list. You learn your ship, its capabilities, and how to fight it and "drive" it. You will likely be rotated around the ship to different positions. You might be exposed to a VBSS mission. It all depends on the needs of the Navy and how your ship is operationally tasked.
In the 2014 article below, replace "Sailor" with "enlisted person." They are the backbone of VBSS, carefully screened and trained, top performers all.
http://www.navy.mil/submit/display.asp?story_id=79179
Also:
https://www.navy.com/navy/about/gallery~vbss~.html
For a very salty but older website with an unofficial first-person account:
https://www.airwarriors.com/community/index.php?threads/the-basics-of-vbss.34233/
The Navy will train you in specific skills or missions if they need you as a VBSS officer. There will be announcements and messages about opportunities to volunteer for the training. Things are always changing; what is true today may not be in 2021.
If you get into USNA, or any Service Academy, you will get many, many briefs over the years, plus summer experiences, classroom training and exposure to officers in a variety of warfare communities, so that you will be well-informed when it comes to service selection time.
With luck, current SWOs may chime in with their observations.
P.S. Hope you enjoyed NASS. It's designed to help you make an informed decision and give you a glimpse of what's out there at USNA and beyond.
