I am late to the party here, but want to leave one last tidbit: read astronomy journal articles. Many you will not understand, many, you will understand the language, but not the math (especially articles, they omit many many steps since they are so short), but ultimately, you will understand some, and understand the data they took to arrive at a conclusion, and maybe even question the data, the measurement, or the data processing. Maybe even enough to contact the authors and ask for clarification, or suggest alternate methods. At this point, you are doing astronomy. One added bonus to being a college student: Awesome libraries that can access all these journals at no cost to you (except your tuition of course).
Some suggestions for more hands on stuff:
Kewl book: Exoplanet Observing For Amateurs, by Bruce Gary (free! courtesy of the author)
edX Courses: They actually teach from journal articles! Math is at the high school level.
Citizen Science projects:
Age? Phooey on that. Upon completing my 2nd M.S. degree in my mid 50's, I got letters of recommendation for PhD school (which I chose not to pursue).