I suggest depositing $ 10 in your account cent. so, the account will look 1000. So, you seem to trade with $ 1000. This can help your psychology to remain cautious in transactions. so, later when you really are an expert and trade with $ 1000, it won't feel awkward and I think for beginners $ 100 is a good amount of investment that will give them the opportunity to trade freely and will also allow them to get some profit with invest that amount, but in the beginning they have to learn some beginners about how to withdraw forex