How can I turn my passion into business

Hello All, There have been many stories about how people have converted their passion into business. I am one such passionate person who has not yet given his passion any business aspect to it, but would like to. I am the founder of Drawmics.com which is was born out of my passion for sketching without an aim to create something worthwhile. It is just like sketching one's mood. While I wanted to do this, I thought there must be similar people like me who would want to create such casual work of art. So I created a social media platform: Drawmics just like twitter where people would sketch, upload images, art works, comics, etc on Drawmics and share it with other people. I am seeing some traction on Drawmics and people registering into it, but until now there has not been significant increase in the traffic. I would appreciate if you can provide your valuable ideas about how to build a business out of it and monetize my passion.

I have a few questions: 1. How to market it. I have used Stumbleupon, facebook, twitter and tumblr ads, but still don't see the traffic I would like to.

2. How should I target my website against people who are participants rather than just passive observers.

3. What improvements on the site that you would like to see?

4. I have contacted a few webcomic artists as well for uploading their works. Some have accepted and some have turned down the offer. Since I am just a guy with a regular job, I cannot pay them.

5. I have used GWT and Php for all the coding, GIMP for graphics and Flash for the sketchpad. Now I am thinking of using SVG and HTML5 canvas for the sketchpad. Would you advise me using any other tools for improving the visibility?

Thanks for your time. Vikrant Ramteke