As a BSc Computer Science student, you can learn many useful skills for free that will help you get a job. You can start with basic programming, data structures, web development, databases, and job preparation. Many websites offer free courses with certificates.

you can learn programming like python and java. it is useful for software, data science, and automation jobs.
you can learn data structures and algorithms. they are very important for job interviews.
you can learn web development like html, css, javascript, and react. these are needed for web development jobs.
you can learn sql and databases. most it jobs ask for database knowledge.
you can learn git and github. these are used to manage and share code.
you can prepare for resume writing and interviews. many websites help in that.
you can do google free courses. they offer it, data analytics, and marketing courses with certificates.
you can study on swayam or nptel. these are free courses by government and top colleges like iit.
you can also learn cloud computing on microsoft learn and aws training.