I agree with your comment. You cannot become a profitable trader by just having basic rules or basic knowledge about trading. Trading is a long-term process. Trading is a learning process. If you only think about profit and percentage but you don't learn proper trading, then you will lose again and again. You need to have complete knowledge about trading. If you can control greed and emotions, then you are moving towards 40% success in trading. You have complete knowledge about trading, but if you cannot control greed and emotions, then you may face losses often.
It's enough for your start but to succeed, you need more for your trading journey. As in any job, you need experience that is important and it's the same in trading. You can not learn about the market only through history but have to live with it, experience in it and enrich your market understanding and trading experience with time. It's another good contributor for your trading success but there is last contributor.
Your ability to control yourself, discipline, greed, fear will decide how you trade, take high risk or low risk or prioritize safety of your fund at most. This is what most traders can not do and they lost trading capital a lot.