Experience is something that sum of all mistakes and this applies to trading. Trading is tough than investing for inexperienced traders. There are trading books that teachs the way how professional traders treats the plans regarding portfolio.
Trading is not so easy that people cannot trade without experience but the reality is trading skill improves with time and knowledge so try to learn as much as you can gain knowledge. Traders should know that when the good time to start according to my experience people is should first learn how to trade and then trade with full confidence.