No one was born good at anything (except perhaps crying). True that some people have a natural aptitude for some things, but most of us get there by a hard slog, and learning from our mistakes. To get really good at anything takes a lot of practice. And probably the best asset you can have is an interest in the subject.

Keep trying, and most importantly ask yourself what is good about your work, and what is bad, and why. That way you will build on your knowledge and improve over time. And don't be too hard on yourself. I bet Stanley Kubrick's first home movie was absolute crap.

And remember, nothing you enjoy doing is a waste of time.