Lets start this off by saying this: your first comic will not become a success. Probably not your second either. And neither will your third if the two previous ones were two-page give-up projects.
Now that might feel demotivating, but if you are doing this for the right reason it shouldn't be. Of course it's normal to want recognition and attention for your art, but if attention is your main goal you're in the wrong business and you will feel unaccomplished and possibly fall into depression long before you reach that goal. There are other, much faster and more surefire ways to get attention. Getting out there and being social being the quickest fix.
With that said, and bearing in mind that you need to be truly passionate and dedicated to the artform in order to succeed emotionally and carreer-wise... whichever way you feel more motivated to go will work the best for now. Since you are still in the pre-discovered phase you have a lot of room to grow, experiment, drop projects without having to provide a proper reason... things you can't do quite as freely when you are further into the business. So my advice on your question is to just do what you want and screw the rest.
Don't be demotivated by lack of subs. That's normal. Only way to move forward from that is to 1. KEEP MOVING! Most essential part! Giving up has a 100% chance of ending the project in failure, which is definitely a higher risk than if you keep trying 2. Keep improving 3. Keep figuring out how to promote your content
All of the artists you perceive as overnight successes aren't really that. I keep seeing people assume that and call it "unfair", but oftentimes what those people are missing are the years of hard work behind it, and the many failures that came before the success.
I made a 300+ page comic that flopped hard. I redrew the first 3 chapters entirely and edited the 4th and 5th ones heavily at one point. Imagine all the time that took. It was with traditional materials too, so it wasn't cheap to do. After those 300+ pages i dropped it and rebooted it. And guess what? It did helluva lot better. For multiple reasons:
Better art
Better story
Larger reach to help push it up to the front page and get it more subs faster
More experience with publishing and marketing
Basically; things you can only get by working hard at it for years. There is no quick fix to get this.
These things will never be spoonfed to you. It's completely normal, and doesn't mean you are failing your attempts, that you are bad, that you should stop, it doesn't mean starting a new comic will fix you an overnight success here and now, and it doesn't mean odds are against you. It just means you are going through the natural motions of artistic and public development, and things will be fine as long as you don't give up.
