I don't know a lot of firm details about libraries, but the BLS suggests you need to aim for a Masters of Library Science.
https://www.bls.gov/ooh/education-traini....htm#tab-4
https://www.bls.gov/ooh/education-traini....htm#tab-4
In Progress: MBA - HAUniv, Anticipated 2024
Completed: BSBA OpMgmt - TESU June 2021
UG - AP Tests: 20 credits | APICS: 12 Credits | CLEP: 6 credits | Saylor Academy: 6 credits | Sophia.org: 27 credits | Study.com: 12 credits | Davar Academy: 3 credits | TESU: 15 credits | Other College: 99.5 credits
GR - HAUniv: 9 credits
Completed: BSBA OpMgmt - TESU June 2021
UG - AP Tests: 20 credits | APICS: 12 Credits | CLEP: 6 credits | Saylor Academy: 6 credits | Sophia.org: 27 credits | Study.com: 12 credits | Davar Academy: 3 credits | TESU: 15 credits | Other College: 99.5 credits
GR - HAUniv: 9 credits