Help a Summer Financial Analyst get to Full Time

How tough is it to switch to IB/S&T or some sort of equity markets role for full-time after being a Financial Analyst Summer Intern at a BB?

Are there any other paths that would seem easier to switch into?

Should I try credit analyst at a rating agency first and then try switching later?

For background, I have an internship for this summer as a financial analyst but I'm not sure if I would like to continue that long term. I'm a junior so have one more year from now before I graduate and I'm looking into other options I may have. I've interned in a few different finance/accounting related roles but this summer will be my first BB internship. Don't have a specific skillset that I'm extremely well at, more like 70-80% at everything. For full time I'm not gunning for just high-paying jobs, my goal is to gather more experience in finance and gain skills that would be useful in the long run. That said, I believe IB will be the best place to get years of experience in just 2 years. 

Appreciate any advice you can give :)