Baseline recommendation for investment: follow the "Bogleheads" approach of defining an investment plan, deciding on a workable asset allocation, invest in the market using low cost diversified index funds: https://www.bogleheads.org/wiki/Getting_started https://www.bogleheads.org/wiki/Bogleheads%C2%AE_investment_...
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
Also helps to learn from great investors directly
Howard Marks - https://www.oaktreecapital.com/insights/howard-marks-memos
Berkshire Annual Letters (Warren Buffet & Charlie Munger) - https://www.berkshirehathaway.com/letters/letters.html
The following youtube series is quite good
The Intelligent Investor: The Definitive Book on Value Investing. A Book of Practical Counsel by Benjamin Graham
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.
There are online learning platforms like Coursera, Edx, Udemy, Khan Academy and Shaw Academy. If you just want to upgrade your skills and don't require any certificate. Then I will recommend Udemy, Khan academy or Shaw academy. In case, you want the university accredited course certificate in investing and finance mgmt, you should enroll in Coursera or Edx courses. However, Coursera and Edx courses are costlier than other platforms. If you want to compare all MOOC platforms, you should visit to course reporter blog.
https://www.youtube.com/channel/UCLvnJL8htRR1T9cbSccaoVw/pla...
He is also posting some great corona update videos: https://www.youtube.com/watch?v=L6iMK0Wcykw
Khan Academy has some good personal finance videos. I really appreciated the videos on the US income tax system, as it explains very well how the system is progressive.
For the very basics, there is a pretty good, free course taught by the economist Robert Shiller called "Financial Markets". It is on Coursera [1] and is a good starting point for learning about different markets, equities, bonds, futures, insurance, and some of the legislation around them.
1. https://www.coursera.org/learn/financial-markets-global