[thingie]

My faculty even allow people to attend its courses as a regular student for some money (not much, ~35 Big Macs).

But of course, you need to be close to a university with decent linear algebra lectures, have enough time and so on. That's harder.

[vog]

Linear algebra is absolute basic stuff. It is part of the first and second semester in mathematics, and also taught in computer science, physics, chemistry and many other fields.

So all you need is a university that provides natural sciences. I can't imagine such a university being hard to find.