Keeping a trading diary and managing risks is smart. Just trade responsibly.
Notes to yourself are important for trading, because so we know income and expenses, but the most important thing is management, how do we work so that we minimize losses, we must first learn what trading is and how the system works, so that we are not careless in taking actions that will later cause us losses due to our carelessness.
Indeed, without knowledge about trading, it is really not recommended for us to take this step, of course the risk we bear is very large or very high in this case. It's true what you say, management in expenses or daily recording of our trades, is really needed so that in the future we can learn from our own experience. The experience we gain is our best teacher to change our own lives. To become a successful and consistent trader, we sacrifice a lot of things, whether it's money or time.