In general
Fact one you will lose money, it will take you a few years to break even and then make a profit so you can either afford to take the dive or not.
Fact two not many people will be willing to enter a contract with someone who is underage therefore it will affect your ability to sell.
Fact three if you cannot take constructive criticism and easily snap at people, you will have a hard time conducting business successfully, people will not conduct business with someone who has a temper tantrum for no reason.
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Now when it come to your "plans" I am curious, what will your initial investment be? What is your business plan?