In theory, it might be possible. There's enough open course material out there to cobble together lectures up to maybe a junior/third year level (unfortunately, senior/fourth year level material does require more rigorous engagement with profs in seminars).
Here's a few suggested courses on political theory (for MOOCs like edX or Coursera, you can enroll as an audit and watch lectures and access course materials for free):
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Justice, Prof Michael Sandel (Harvard) (Youtube version)](https://www.youtube.com/playlist?list=PL30C13C91CFFEFEA6)
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Moral Foundations of Politics, Prof Ian Shapiro (Yale)
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Revolutionary Ideas: Utility, Justice, Equality, Freedom, Prof Alexander Guerrero (Rutgers)
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Revolutionary Ideas: Borders, Elections, Constitutions, Prisons, Prof Alexander Guerrero (Rutgers)
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Introduction to Political Philosophy, Prof Steven Smith (Yale)
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Introduction to Political Theory, Prof Mithilesh Kumar Jha (IIT Guwahati)
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Introduction to Modern Indian Political Thought, Prof Mithilesh Kumar Jha (IIT Guwahati)
The following are paid lectures, but, I highly, highly recommend you to see if your local library might have these, or if it can do interlibrary loans for you (otherwise just get them from Audible):