You should avoid these mistakes which many new traders make:
1.Trading with indicators and fancy tools
2.Not fully understanding and implementing risk/reward
3.Not understanding position sizing
4.Not having a trading plan
5.Gambling instead of trading
6.Allowing emotions to cloud judgment/giving into emotions
7.Not having patience
8.Not trading higher time frames
9.Over-trading/being too involved
10.Not taking profits
goodluck