Mistakes are okay for a newbie because that will serve as a source of them to be prepared in trading because mistakes means lesson and lessons will give you a lot of knowledge so there is no worries if newbies get mistakes or even us, average traders always get mistakes but it is alright because we can still make money if we just continue trading and make those mistakes as a lesson or basis when trading.
Yes, mistakes are okay for a newbie but not only for a newbie sometimes people who have experience in trading still can make mistake, using a mistake for lessons to be a better trader. Every activity we do still can make a mistake even the activity is usual with our life, prepare your mentality and realized that trading is not only profit but also losing money.