New investor here and I keep losing track of my own thesis. What do you guys use?

Hey everyone, I am a relatively new long term investor and I am realizing that the hardest part is not picking stocks. It is staying consistent with my own thinking. I will research a company, write down why I bought it, what I think the key drivers are, what risks I see, and what would make me sell. Then a few weeks later some news drops, the stock moves, and I honestly cannot remember what my original thesis even was. Sometimes I sell too early because of noise. Sometimes I hold even though something I was worried about actually happened. It feels like I am reacting instead of following a clear framework. Right now I just use random notes in Apple Notes and screenshots. It is messy and I never actually go back and review them properly. So I am curious, what do you guys use to track your investment thesis and risks? Do you use Notion, a spreadsheet, a journal, something else? Is there any app actually built for this kind of thing or do most people just build their own system? Would love to hear how more experienced investors stay disciplined and avoid getting swayed by every headline. Thanks in advance.