Question About Fixed-income trading/research/investment opportunities in the US Sell/Buy sides for an international MBA student.

With 14 years of experience in Chinese fixed-income asset management, spanning roles as a trader, analyst, and investment professional, I’m now looking to pivot to the US market. Now I’m the MBA1s in one S16 Business school. Given the challenges for international students in securing buy-side positions, I’m targeting sell-side roles in investment banking or large commercial banks, specifically in trading or fixed income/strategy research.

1. I know that almost all MBA(maybe except for Columbia and Wharton) schools are target schools for my goals.
2. I know that every year MY B-school typically has 2-3 graduates to IM or sell-side in IB.
3. I know that on Campus IB mainly focus on banking (IPO, M&A) and only off-campus offer opportunities in Capital Market or Sales and Trading or Sell Side research in IB .
4. I know that it’s a hard pathway for an international student.

My Question: I would greatly appreciate the opportunity to learn more about the structure and nuances of the FICC (Fixed income, Currency and Commodity) function or Capital Market function at US IB giants or any fixed-income research, trading or investment opportunities at US buy-side? . Any God share his/her idea and guide?

Appreciate!