Roxy, I know you will become a successful trader :)
May I ask what trading plan you're using to trade non-emotionally and keep a stress-free work environment in your trading business?
One way to do this is, practice trading on a demo account with a strategy and a trading plan in place.
Take the highest % winners on avg and base a new "LIVE" trading plan around those rules of engagement.
Then you can easily work out your position sizing and money management to trade that...