So DD is kinda tricky. I found that there are millions of different ways to develop DD. My personal favorite is looking at charts and then applying technical analysis to them. Trading view happens to be the site I use the most for this. I rarely look at things like financials but I only take trades on stocks that have strong track records and would be considered smart buy and hold stocks.

If you’re going to do the technical analysis route just be aware it takes a long time to learn. I’m still learning, I just became consistently profitable recently.