I'm currently want to take time to learn about investing and personal finance management. What are the online courses you could recommend?
Read the book Malkiel - A Random Walk Down Wall Street. https://en.wikipedia.org/wiki/A_Random_Walk_Down_Wall_Street
If, on another hand, you do want to start spending a lot more time and effort and money trying to actively identify good investments, versus the low cost, low risk, low effort, likely higher reward approach of investing in low cost diversified index funds, one place to learn about value investment is Aswath Damodaran's website & blog: http://people.stern.nyu.edu/adamodar/New_Home_Page/home.htm http://aswathdamodaran.blogspot.com/
Perhaps of interest re: valuation of businesses based on user & subscription metrics: Damodaran - Going to Pieces: Valuing Users, Subscribers and Customers https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3175652
Howard Marks - https://www.oaktreecapital.com/insights/howard-marks-memos
Berkshire Annual Letters (Warren Buffet & Charlie Munger) - https://www.berkshirehathaway.com/letters/letters.html
Its not an online course, but it's a great book! It has a lot of information in it, can be dry, but I'm really enjoying going through it so far. Warren Buffet has quoted it in his shareholder letters and other talks.
Link: https://www.amazon.com/Intelligent-Investor-Definitive-Inves...
Also check out Warren Buffets shareholder letters, they are packed with great insights into investing.
He is also posting some great corona update videos: https://www.youtube.com/watch?v=L6iMK0Wcykw