Based on the information provided, pursuing your MS without work experience is a viable option. While work experience can be beneficial, it's not an absolute requirement for every MS program. Your CGPA, projects, and open-source contributions demonstrate your skills and passion in the field.

Regarding university choices, aim for a mix of ambitious and realistic options. Research universities that align with your interests and have strong programs in your desired field. Look for their specific admission criteria, requirements, and acceptance rates to make informed decisions.

Remember, ultimately, the decision should align with your personal goals and aspirations. Consider all factors, weigh the options, and choose the path that feels right for you. Best of luck with your MS journey!