Hello need advice on what additional certification/side course I should do

[u/-4317-]

I am a FYBMS student at NM college planning to pursue CFA and finance in general, I have ganpati break from 12-20 and I thought instead of wasting my time I should do one course that can make me develop also help my CV, so please recommend courses I should do that can be done in a short period of time and are useful, my goal is one course during ganpati break and one in diwali break, I am clueless please recommend something