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Coursera is having free online course for almost all the courses.
Recommend for Excel course, Bookeeping course also Python course.
All the courses with different timeline. Financial aids available too for almost every course.
To enjoy free full course, apply for financial aid first before enroll to course.
Kindly remind that enroll for free course only entitled for few learning material. Proceed to financial aid first.
Visit Coursera for more detail.
Click Here for detail