You are not doing anything wrong, you are only skeptical and don't want to lose money. You are not taking too much risk because you feel convinced and satisfied with the little profit you are getting from your short trades which is very good, just that you will not earn big on time

Slow and steady win you race; keep going like this to keep accumulating your experience, and keep learning because am sure one day you will dream to trade high in which if you are able to gather some experiences now will be easier for you to manage your risks because there is no reason for rushing to make it quick while you can do it gradually with less risks.