What do you have in mind for the style and theme of the business card?
I am not so sure about the colours yet, but the logo has just black and white. That said, maybe it's too boring, maybe not? Perhaps designs with some color could also be tried out, instead just black and white (or in addition to it). The design has to look very premium and "expensive" but at the same time fresh, as I am a consultant for digital marketing, something that is more serious.
I am not sure. I do like very very simple designs, but sometimes the louder designs could work also - as long as they still appear premium/ advanced/ expensive and sophisticated in a modern way.
Brand name to include on the business card
What to avoid
Don't just do black and white designs, get a bit more creative!