It's depend on you how much you need for trade, trade is free you can use of small amount to started.
and not recommended to using a lot of money if do not have a skill to do that.
You are absolutely correct. In order to start trading, one does not need to have a huge amount of money rather skills are all that really count. A person can start trading with even 30 dollars. Like you have already mentioned, it is preferred to not trade with ample amounts in the beginning. One more thing, trading with small amount will return small profits. It is going to take few years before he achieves his goal.