I’m afriad that in-depth analysis on stocks can be hard to find without having to pay something. This kind of analysis often takes a lot of time and effort to find a good company and then research it effectively. I’ve included some of the free sources I use below:
Seeking Alpha has some articles that are free to view - some are for Premium users but I appreciated that some are for free. https://seekingalpha.com/
Morning Star also has some articles that are free to read: https://www.morningstar.co.uk
Both may require you to sign-up but you can sign-up with throw-away email addresses if you prefer.
I also like occassionally check the likes of Hindenbergy Resesarch (just in case they put out an exposé on a company I am following). These are the guys that exposed Nikola for using a truck rolling down a hill in their advert rather than under propulsion of their engine system. https://hindenburgresearch.com/
Also interested to hear what others might use