Not just to the forums, everywhere. Forums is a great place to start, though to get into a community and start networking. However, it's also super important to be apart of other online communities to build and network more. For example, every Saturday, 8:30 pm EST, is #WebcomicChat on Twitter where LOTS of webcomic artists talk and discuss a new topic each week. Get out there, explore the internet, make more friends by being genuine and more subscribers will come.
Congrats on the first sub, may many more discover you.