I completed my B.Com in 2015 and I am financially weak. What should I do?

Learn tally and apply for the job. You can earn money and then continue your study. If you don't want to continue your study then do it as a permanent job.

If you want to continue your studies, you can join any part time job so that you can manage your expenses.

First of all, settle down in some job and earn money. Save as much as possible and then pursue an online course. For anyone, money is important to survive.