I had mmr vaccines as a child. i also had mmr when i was 23 upon entering college. i'm in my 40's now. am i more protected or do i have more antibodies than a person who only had their childhood mmr?

Yes, you are. FYI, 2-dose MMR (measles-mumps-rubella) vaccination at age 1 and between 4-6 became standard in late 1970s. Yet, in late 1990s, outbreaks of mumps at college campus were reported among students who even had 2 doses of MMR.

You do not need a booster dose. Visit this site for information on this topic: https://www.cdc.gov/vaccines/vpd/mmr/public/index.html Get Covid vaccine. Wish you good health!