I wasted many years believing I couldn't draw, even though I had shown some promise in art class as a child. So what happened? On a flight one day, I picked up a pencil and drew the profile of the passenger seated across the aisle from me. It only vaguely looked like him, but it was a fairly good drawing. I kept it for years. Once in a blue moon I would look at it, and then tell myself it was a fluke. There was that pesky neuropathway that told me I couldn't (parents, encourage your children, praise them, discipline them properly, and always do it in a loving manner, or they will develop that negative neuropathway that will be a major pain to fix -- if, and only if, they realize it as adults).
Fast forward some years. I saw this little set of watercolors with a book that said even idiots could draw and paint, and just for the heck of it, I bought it. Eureka! It broke through that idea that I couldn't. I could. I did. And I was unstoppable. I wish I could remember the details of that book. It's stored somewhere, but I don't know where. The point is: You never know until you try. Don't let fear or misconceptions hold you back. Try it. Then you'll know for sure what you can and cannot do.