As per the advices on courses, I can help you if you share your field of interest as there are many courses professional & other courses available. As you told that you are Post graduate with Master of Library Science so I would suggest you to cope up your self in this field to get a good position.

Library and Information Science is an interdisciplinary field that applies the practices, perspectives, and tools of management, information technology, education, and other areas to libraries.

If you have the practical knowledge to maintain the library and having knowledge information systems management,  classification / cataloguing systems, bibliography, documentation, preservation and conservation of manuscript, collection management, information systems and technology, research methodology, computer applications then it will help you to grow & make a career in this field very easily.

You can apply in Universities for Library Attendant, Semi-Professional Assistant, Junior Librarian/Professional Assistant, Assistant Librarian, Librarian/Chief Librarian etc. There are many top Organizations also which have the libraries. If you want then you can also go for NET & further study related this.

Decision should be yours what you want to do.

Good Luck!