Why are you doing this?
It’s not always a simple question to answer. Sometimes, introspection can be the cause of pain. (Being uncomfortable is being in pain. Don’t let semantics get in the way.) Sometimes, that pain is needed in order to get to a clear answer.
If you’re doing this for money, there are better ways to dispose of your money than creating comics. You could buy a car. You could make a hefty down payment on a house. You could take a trip to a foreign country. There are a lot of ways to use the disposable income you have besides creating comics. Money shouldn’t be the motivator here.
Fame? Comic book creators are not famous. Nerdlebrities, maybe, but that isn’t true fame. Do you know who’s famous? Oprah Winfrey. Tom Cruise. Stevie Wonder. Michael Jordan. Jennifer Garner. Paris Hilton. That is fame and celebrity. Hell, Adam West is famous. Is Jim Lee as famous as Adam West? Grant Morrison? Alan Moore? No. None of these creators are as famous as Adam West. Comic book creators aren’t truly famous, and it will take a set of truly extraordinary circumstances for that to happen. (The only creator who has true fame is Stan Lee. Like I said, truly extraordinary circumstances.)
So if we cut out money and fame, what are we left with?
Hopefully, we’re left with a love for the medium. Love can take you very far.
Hopefully, we’re left with a need to tell a story within this medium. Not every story is suited for comics, just as not every story is suited for novels or film (television or cinema). The feel for what will be better as which will come in time, but only as you create. (Think of creating as working out. The creative muscle has to be developed. Only through that development will the feel come.)
However, it all starts with the answer to the question. That answer, whatever it is, will be individual to you.
Just make sure you answer honestly. Without that honesty, you’re not going to end up where you believe you should.