So as stated in the Shopify Terms of Service you must be over 18 in order to hold the account. At the moment your option is to have the account under your parent or legal guardian's name after getting their consent, and for now you will also need to have their bank account connected.
I hope this helps! In the meantime, do tell me a little bit more about your business and I will see if there is anything else I can offer in terms of advice or assistance. If you're struggling on how to get started, do take a look at our Shopify Blog article on the Store Launch Checklist which goes through all the elements you need to look at before you're ready for launch!
Let me know if you have any other questions here.