successful trading is about managing risk minimising it as possible as we can , i have read that with correct risk management even with flipping a coin we can do trading and be profitable
i want to know what methods/rules are there to minimise risks
Studying is the best way to lessen any risks in trading. What to study? Those market / cryptocurrency you want to enter or invest in. Although studying and researching takes a lot of time and requires huge amount of patience, it would be worth it, as knowledge is your only tool to manage risks. Other than that, experiences would lead you to your best mentality and management in trading.
I suggest take time first to study the market you are entering and how to trade well, then take trading simulations to somehow have a little experience. And then try to invest and let your experience shape you.