What is the best online stock broker with a low minimum deposit and low commision?

• accounting degree online accredited
• online stock broker
• prepaid debit card with direct deposit

I'm just starting and I'm doing it with my father (I'm underage so it'll be his account), and Questrade needs a minimum deposit of 1000. I'm only looking to invest 100. What would be a good broker for me?

What is the best online stock broker with a low minimum deposit and low commision?