I sometimes post my comics on reddit's r/comics. Last week's comic ended up with 65 upvotes and 4K views. My traffic has been picking up a bit more too via facebook.
What I've learned from a couple years of content creation is that you don't necessarily have to be GOOD at what you do to be popular. You just have to be seen and known. Make your craft as good as YOU want it to be, but you gotta know where to hustle it to people who haven't seen it before.
Also! Have a backlog for new viewers to read! Why would you advertise a comic to me if it only has 3 episodes, you know? You aren't asking for new readers at that stage, you're asking for commitment from random people.