Well, this doesn’t sound so much like an art problem; it’s more a problem of self-discipline and motivation, no? You have to be very strict with yourself. Pick the project that you feel the strongest about, shelve the others, and set deadlines. Put aside time each day to work on the project, even if it means not doing fun things. Maybe you need to give up watching tv or movies, or playing video games, or playing on your phone to make time for it.
That does sound very motherly, doesn’t it? :)
But yeah, if you can’t muster up the self-discipline to do the work, the work will never happen. You have to ask yourself how much you really want to make the comic happen. How much are you willing to sacrifice?
The truth is, we’re all creative. You’re not really that special just because you have some good ideas or you draw okay. What makes an artist truly noteworthy and successful is their drive and their work ethic. A successful passion project is 5% inspiration, 95% perspiration. Get out there and sweat.
Preach it, girl! This is something a lot of people don’t understand about making comics. It’s a LOT of work and you have to be really dedicated to it.
The internet is filled with partially-started comics that died after only a chapter or two. Sometimes it’s just not possible for the artist to continue for one reason or another, but most of the time it’s because they find out it’s more work than it’s “worth” to them. How much is your story worth to you?