good for u..cfa level 1 is usually done in 4th year.

as for writing the exam ask some of ur professor if they can sponsor u (give scholorship) for the exam as professor who have cfa title can do this...ur exam fee will be heavily minimized.

also instead of taking classes, the level 1 is self-study..just buy some of the kaplan books or online notes (chek website) and practice every day and u will be fine

what kind of field/job do u want to go after graduation?