Jane Street vs. Investment Role in Insurance Company

I am a student from a top University (think HYPS) with a STEM degree and I interned in the Sales and Trading department of a top BB last summer (sophomore summer). I have a good relationship with the people I interned with and, while I will not be interning with them again this summer, I have an understanding with them that I would likely have the opportunity to join post-graduation. I enjoyed that as a good intro, but I'm still quite unsure about which career path I'd really like to go down.

I'm sure that I would like to be in finance, but right now I am struggling with deciding between a more quant-y role, versus a more fundamental, "investment analysis" role.

As of now, I have received three offers
1) A relatively small insurance/pension fund which does both market-based and private investments to be an investment analyst inter.
2) Jane Street (Quant shop)
3) Citadel (Quant Trader Role)

The safe pick seems to be the insurance fund. I think I could do well there, and I think a lot of the training I received from my BB would also be applicable. I also think that this role might be useful in a variety of exit opps. Exit opps are a priority for me. I think this is the most likely career path for me to go down.

My dilemma is that I have really enjoyed the interview process with Jane Street in particular, and I think the culture is a great fit for me. I have also enjoyed my interviews with Citadel, though it feels like less of a culture fit. I am excited by the idea of continuing to use my STEM background in the markets, but I am unsure if I will be great at the job. I think that I am good at math, but I'm certainly no math olympiad participant. And my coding abilities are certainly not top notch. But I keep making it through the interviews (though I do get stumped every so often.) In other words, I am excited by the idea of trying this out for a summer internship, but I'm not confident in my ability to perform at a top level.

1) A big consideration of mine is, if I don't go into this industry now, will I be able to reach it later? For instance, a big motivator for me to go to JS/Citadel for the summer is that I think an exit from BB S&T to an investment analyst role like the offer I currently have is possible. Am I right about this? If I go to a top BB and do Research/Trading, will that leave the door open to exit into an investment role? If I'm an equity trader at a BB, would that leave the door open to a quant fund later?

2) I understand that Citadel hires a lot of quants but has a variety of other strategies they also use to invest. How easy is it to move between teams at a place like that?

3) Jane Street and Citadel are definitely bigger names than the insurance fund. Will that be useful down the line to have a more reputable firm on my resume?

4) Am I correct in thinking that the investment analyst position at the insurance fund has the best exit opps? For instance, does it seem like this could bring me to PE or a hedge fund?

Anything else to add? Thank you so much for any help you can provide, this decision making process has been tough for me, and I have to decide by end of week!