I think it's a good idea to have a steemit business card, but I'd hold off on quitting the job. It is such a roller coaster in these early days. I see that you have made quite a few blog posts but very little in rewards yet. You still have bills to pay. I'd wait until you are reliably making enough to cover your current income before quitting. I started my own business and quit my job too soon. Now, it's been a struggle and I had to get another job. I'm just sayin', don't get caught in the hype. Take care, man.