This video can help you to understand how you can create your own characters. You can quickly see how it is evolving and finally a satisfactory result.
Ask yourself:
Is your character real or imaginary?
How old are you?
What is your personality?
Ask yourself these kinds of questions and look for references that will inspire you. My character is real, an older man who had a very cheerful, energetic personality and an adventurer. Find references that can inspire you
If you want to know more about this character visit my previous post.