Christian,
Welcome! What's your intention here as far as your artwork and how you see this "platform" working for you? Many of us here treat this site as our "business" and that is one level. Others enjoy posting images, and let friends see your stuff and that's good too.
But the amount of work required for the business level to grow and prosper is very different than the second example I used.
Knowing WHERE you want to go, will help others here answer any questions you might have....
Rich