What should I do

I am a bca data science graduate. And I wish to go for business analytics in future. I got selected for analyst trainee role in CTS (it's the lowest tier with 2.8 lpa) during my campus placement and I thought going for a year there then continuing with my masters. It's now 6 months after graduation, the date of joining is still pending. In the mean time I applied to 400+ jobs and 2 interviews and didn't got any. Now even if I joined CTS next month, I can't enroll next year for my masters as my experience will be less than 1. I need a real career advice. I am in a situation where I'm tired of waiting for this and really got disconnected to the role and my motivation is gone. My plans failed and I really don't know what to do. I only have a bachelors degree and I like to study btw. What should I do. Prepare for masters like mba or entrance , wait for cognizant and sit like this. Or drop the cognizant and do projects and internships aligning to business analytics. Idk I'm really in a loop