Click on the following link from the American Economic Association (AEA): https://www.aeaweb.org/resources/students/careers
See data on career prospects from the Bureau of Labor Statistics (BLS): https://www.bls.gov/ooh/life-physical-and-social-science/economists.htm
Another cool website useful for career prospects: https://www.onetonline.org/
There are lots of information online and blog posts that can help you determine if grad school is for you:
http://gregmankiw.blogspot.com/2010/03/choosing-graduate-program.html
https://www.usnews.com/education/best-global-universities/economics-business
There are some federal programs and camps that can help you get ready for grad school in economics as an undergraduate, here are some links:
You should consider sending an application to the AEA summer camp: https://www.aeaweb.org/about-aea/committees/aeasp
For underrepresented students, there are really good programs such as the PhD project or the McNair scholars projects that provide research and mentoring opportunities: https://www.phdproject.org/ or https://mcnairscholars.com/
There are good resources available online to help you catch up and improve your math skills: https://www.edx.org/ or https://ocw.mit.edu/index.htm