If you're just starting you dont need to use a lot of money as capital its a very risky move since you are not knowledgeable enough to face the consequences of your action. You need to follow the process of slowly learning by experience.

Then if you already know the nature of how trading works and you're ready to risk your money and depend on your trading income for a living then its time to use a lot of capital to gain huge profit as well.

But its not going to be easy, plan and strategy are needed. Have a risk, time and stop loss management.