You don’t get better writing a post, or book. Just as a marathon is not a hundred meter race.
You might not hit the best selling list with your first book, second or third. You might not ever hit the best selling list in your whole career. But that doesn’t make you an awful writer or take away the glory you deserve, the best-selling list might not be the important thing, compare to the life’s you have or will be changing, the soul you have or will be touching, the mind you have or that will be forced to think, or the beauty you have or will be bringing to the world through your imaginations.
It’s an honour to participate in a marathon, but how far you race through is more honourable. It’s also an honour to be a writer, but how far you write makes you better and great writer.