Mainly if you like digital art. Sometimes the creative processes and techniques are different in such a way you make very good artwork in one medium even if not drawing well on another. You can experiment with any medium you have access to. That's the best way to figure it out your art.
That's totally fine. Every artist have their own comfort zone. Some can't do traditional art well but does better on digital and vice versa. It's up to you if you want to learn digital before traditional, but I suggest practicing on traditional drawing first will help you a lot as you go to digital.