My words of advice to you are keep at it! You will really surprise yourself if you continue with it and dedicate yourself to learning to your art.
There are lots of very talented people here willing to give advice and help you grow and improve.
I would suggest getting a sketchbook and start off by drawing simple things. Focus on things like balls and boxes and getting the shapes "just right" after you are able to get shapes down..start working on shading. Get used to the pencil and pressure and how the values look depending on the pressure you exert. The harder the pressure the darker the value. Maybe see about taking an art class.
And yes Bushcraftonfire is correct..art is about creativity so if you don't want to focus on realistic art you can always work towards the modern art end of things as well. There is a huge market for abstract and modern art.
Ask lots of questions! We are here to help!