You'll never succeed if you don't have that desire to learn more, if by a single mistake and losing money is the only basis to quit then trading will not going to work for you, there are lots of experience losses that may take place as the market always have it's own up and down, it's you that needs to adjust and adopt if you want to succeed.
There are failures which mostly cause of wrong decision making and wrong assessment and analysis but you can use those mistakes by learning from it and not to allow yourself repeating the same patterns.
Learning about trading is of course very important to be able to make a profit from the trading that we do and it is absolutely impossible to make a profit without knowledge and skills in trading and in fact we often see those who already have a lot in trading still learning about trading to can get good results and if someone starts trading and they experience failure but don't learn from the failure they experienced of course this will make them lose their money when they try to trade again without learning about the mistakes they have made of course the results they The gain will remain the same, but if we really want to get good results from trading, of course we have to take the time to study so we can get good results from trading.
Take time to analyze and point out all those possible mistakes that you've done from your first hand experienced, that will allow you to learn and make a good adjustments, like what you mentioned if you don't learn from that mistake then it will be the same thing when you try positioning your trade, it's a never ending learning process as the market is fluctuating from time to time.
You need to be ready to adopt and change your trading style, it's needed to be sync with how the market is moving forward.