I have no economics background (well I guess I took a macroeconomics class once), but Martin Shkrelli (yes that Martin Shkrelli) has a pretty great playlist on youtube [1] that goes through exactly how to do fundamentals analysis. Warning: the videos are long and dense.
Sorry, I'm not sure I can give good advice on this because I got a bachelor's degree which is probably way more than needed. There's probably a more efficient way.
[1] - https://www.youtube.com/watch?v=ARrNYyJEnFI