Hello! Nice to meet you as well.
First off, that's an interesting comic you have there! The premise is really fresh, and the characters seem interesting.
I have a little to say about the readership thing. You could probably write a book on how to get the most out of Project Wonderful advertising - I bet someone has - but until you get a better feel for that, I'd recommend that you don't spend much more than you make.
For me, it's been much more effective to, well, do what you just did - post in forums, join communities, and try to get your work recognized there. Like topwebcomics, the webcomic list, belfry, deviantart, and so forth, as well as their respective forums. Places like that are a lot more likely to attract people who are actively looking for webcomics that they'll be following consistently for a while. If you are going to advertise, try and stick only to relevant sites.
On a tangent, you could try to clean up the image quality a little bit. There's a little bit of 'stair stepping' on the text and some of the comics - and on your signature image! Try drawing the image two or four times bigger than you plan on publishing it, then shrinking it down. If you work at an even multiple like that, the image should stay crisp even after you resize it.
I hope some of that helped! And I hope you stick with it, I'd like to see where that story goes.