For someone like me who has good writing, but mediocre (at best) art for my comic Life of an Aspie and has been plugging away for almost two years now, I can tell you that there is no magic key starting out as a creator even if you start off on the best footing possible. What I can tell you though is to learn general marketing skills. If you want people to care about your comic, you have to be the one who takes the initiative on that. Part of that is treating your potential subs as people, not something between you and your long term goal. For example, at my new job, the managers have been stressing during training how important it is to give our guests excellent service every time so that they keep coming back as much as they possibly can which in turn adds to the overall value of my particular store.
If we treat them as an obstacle standing in front of our next paycheck, not only will our guests be less inclined to tip, they will also be less inclined to return to our store in the future. In a similar way, if you take potential subs and your actual subs for granted, they will see through your façade and react accordingly which is why even if it feels sometimes like you are rolling a heavy rock up a hill that you try to give it 110 percent not just as a creator, but also as a person communicating with other people. That means answering questions your subs may have about something in your comic. That means taking an interest in your peer's comics.
And of course that means being passionate about what you do even if "behind the scenes", you are having a terrible day.
Wrapping this up, I can guarantee that I would not be where I am today had I not cared enough to start communicating with people here often with no thoughts towards them checking my comic out in exchange for me doing the same.