Always avoid overtrading
This is something that I didn't had control on. When I started trading, I used to keep on checking the prices to see if I had made any profits. Whenever the price used to go low I would panic and start selling which eventually resulted in loss in most of my trades. This is why I left trading.
You are right that overtaking should be avoided in trading if there's not much in every case I too lost my money thanks to over trading but now i'm ready to move forward with education from there. Don't quit the business but avoid overtrading.