Not trying to throw water all over your desire to take responsibility for your own safety, but there is a lot of responsibility to carry of a firearm. While I fully resist any attempt by the state to mandate training as a condition of carry; I fully encourage anyone wanting to protect themselves to get training.
You haven't mentioned anything about training. Maybe, invite one or both of your parents to get some training with you. Basic firearm safety and further trading in legal use of a tool for defense of self and others as well as the potential risks.
If you are still living with mom and dad it may just be easier to wait until you are providing your own roof.