Safety Advisors work under the Lead who comes from UL to help at FIRST events. The UL people I've worked with have been great folks. They care about the task they've been given and take it seriously.
There are no low level jobs at FIRST competitions.
What we look for is a level of maturity that would allow the person to work well in the Safety team, a good listener with the teams and other volunteers and the ability to take the mentoring approach to problem solving and rule enforcement.
I've met some Safety Captains on teams who would make great Safety Advisors.
Go for it next year, but be sure to also list other positions you would consider. There is a space for you to write comments in the VIMS, where you could list your experience. The job description is posted through the VIMS site.