Hi Angie, welcome to the community!
Wow! What a treasure and incredible discovery!
You are on the right track to get it analyzed and verified with the faculty and staff at the University / Museum. You should reach out to a local Rockhound / Gemology Club. Members of these groups/clubs are always good resources to find printed books and local experts.
To valuate it, you can start with these websites to begin researching on what points of interest will affect the price.
Several discussion topics like Inclusions in Baltic Amber here at IGS should be read for additional links.
IGS - Amber Value, Price and Jewelry Information
ICG - International Colored Gemstone Association
Amber International
Amber Getty.edu
Amber - Minedat.org
Amber - Gemdat.org
Check out the business section here at IGS. There are quite a few companies that may have insight on selling/purchasing your treasure!
And I couldn’t resist adding a wiki page on the New Jersey Amber with several good references to search for.
Cheers!