There are resources online to teach you from emergent to mastery stages so I would look for those first. Keep in mind that even if you're at the mastery stage, doesn't mean you'll always win/profit..
Kind of like the sports lines, you have to be knowledgeable about the teams, athletes and other relevant variables so in your case, be knowledgeable about the stocks you're investing in that are relevant to the overall stock market picture, know the right time to invest, and of course have a little bit of luck on your side as well. Again, doesn't mean that you'll always win but you will have an edge over a novice.
Back in March, my oldest sister lost about $300k in stocks mainly due to COVID but she's already got most of it back.