When you’re writing for comics, you have to understand the medium you’re creating for.
Novel and cinematic pacing will not help you to tell your story. Generally, novel and cinematic pacing move slower because they have to build the world, build interest, and then once you’re invested, they can veer off into other areas as the story gets told.
You can’t do that in comics. Generally, the slow burn doesn’t work, because instead of sowing the seeds that will be harvested down the road, you meander into things that are uninteresting and that don’t have much to do with the story you’re trying to tell.
Most new creators don’t know how to do a slow burn, and if they did, they haven’t garnered the trust of readers because of they’re new. It’s a Catch-22, and the only real way out of it is to tell a different story, coming back to this one when you’ve made something of a name for yourself.
Comics are outstanding for doing a lot of different things. The only real weakness of comics is that there isn’t any sound. You can do anything you can imagine in comics because there isn’t a budget. You can have a set or setting in some strange land, you can have complicated chase scenes, you can have bullets doing all kinds of crazy things…anything you imagine can be done, because the only budget is how much you can afford to pay your creative team.
You can compensate for the lack of sound, though. Onomatopoeia is alive and well. It just needs controlled placement. (And it cannot be off and on in a comic. You have to commit to it. Either do it or don’t, but doing it only halfway won’t cut it.)
Pacing is something that is very important in comics. Pull out comics from various eras in your collection. Pull out various types of books from various writers. See what they do with the pacing. Study them. Let their work help inform your own.