Hello dear !
Yes you can pursue your in career in cruise with B.Sc background.
A bachelor degree is enough requirement  to be hired.
I'll mention the minimum requirements or eligibility to pursue career in cruise.
1.you must be atleast 21 years old
2.hold a valid passport
3.meet the language requirements relevant to your position.
4.pass a medical examination
5.have the required visa or work permit

Good luck