Career advice; What should I do more to my chances and what am I missing?

Hello!

Background:
I am a junior attending top state school (think Berkeley, Michigan, or Virginia) majoring in Political Science. I am a transfer to the current institution last semester from a community college.

Things I did:
- Political Finance Intern at Congressman Re-election campaign.
- Political Research Assistant at Top private school (think Stanford, Harvard, or Columbia)
- Currently working as Strategy Research Assistant at Current Institution B-School.

Weakness:
- I literally f*cked up my first semester GPA like 2.4/4.0. I just took too many classes and realized that too late.
- I am an international student; hard to get H1B sponsorship these days.

Future Plan:
- Planning to apply business minor or emphasis track in current institution.
-After failing to get an internship at BIG 3 and BIG 4, I am tiring to get fellowships from DC Political think tank or Top B-Schools RA internships.
- Want to improve R, Python, and Excel during summer.
- After completing the Summer internship, I have to go back to my home country and has to serve. I am trying to use this period to study GMAT and Case Interviews

What am I missing? What can I do more to better my chances?

Thanks!