Library Assistant

To become a librarian you need to do a course around it. There are Diploma and Certificate courses, for the students who have passed 10+2 level education. For Bachelor courses like B. Lib. (Bachelor of Library Science) & BLI Sc (Bachelor of Library Information Science), candidates should have a graduate level degree from any recognized university.

Candidates who wish to pursue B. Lib course must fulfill the below-mentioned eligibility criteria. Bachelors degree in any discipline from a recognised university. A minimum score of 50% in the same. Although, in some cases, minimum score and age limit for pursuing B. Lib course varies from institute to institute. However, there is no set age limit for pursuing this librarian course in some distance learning institutes.

That might be minimum qualification, obviously Bachelor's is much more higher than a certificate course in terms of academics.

With this degree, you are eligible to be a librarian.

IGNOU, AMU, etc. are best for doing the same.

Go through the link below for details:
https://www.shiksha.com/humanities-social-sciences/library-information-science/course/bachelor-of-library-and-information-science-department-of-library-and-information-science-university-of-delhi-north-campus-121229

You can qualify as a librarian either by studying for a university qualification or by working as a library assistant and doing work-based training. Admission to B.Lib course in some of the top B.Lib colleges is based on the merit of past academic performance.