Just a little help from one noob to another.
I have seen a lot of forums where people are saying their comic isn't getting subscribers, and that they can't sink money into advertisement. Well I follow web comic Avenue on Facebook and they are having a contest that will help with free advertisement and exposure! (this is why everyone always says follow groups and be active on twitter!)
Here is a link to the contest rules. I am pretty sure you have to have your comic on their ranking site, so go add it to TopWebComics. Even if you don't enter the contest it's a good move to do this.