there's the saying that if you shoot for the moon, you'll land in the stars. And to me that saying is about flexibility. Often as we learn more and more about the things we are pursuing, we learn about what is or isn't reasonable. It's easy to dream up all sorts of things--but then you may realize the path to those things is not the path you are on. Like comics CAN become movies and TV shows, but that's not a normal path for movies and TV shows--that's a film path, which is a totally different career. But if you make a comic it can be a wonderful comic, and may in it's own way fullfill a lot of things for you and for your readers.
So I try to focus on one thing at a time with all of my projects--to be mindful of what I want it to eventually be, but to reign it into what is feasible and possible for NOW. For my skillset of right now, where I am right now. Not to the skillset of where I MIGHT be if I start updating (because you don't want to be updating and realize that your schedule is too tight)
And I make goals (like actual numeric goals) To get that project to a point of success within hopefully a few years, and if it isn't really doing it, if it's not really catching on, I'll either adjust the project to better match my strengths or I'll do something else.
So to summarize, I think it helps me set better goals if I focus on my strengths rather than my weaknesses. My strengths, personally are art and story--that's why comics felt like a good fit to branch into story from art (because most people who follow me online are unaware that I write.) However, while I have knowledge of animation, while I did take classes in it in college, it's not one of my strengths--so I don't do it. I don't plan for my pieces to be animated. While I can play piano really nicely and I do play around with compositions about my pieces--it's not actually as strong as my art, so I don't plan for my pieces to become musical adaptations. While I know 3D and could get my hands on a 3D printer, I don't make toys about my stories--because it's just not as strong as my art and my story. While I loved Undertale and I think that visual novels are a great time, I don't think I'll be making my story into a video game any time soon, because I have done enough video game programming to know I know nothing.
So really make a list of what you enjoy doing but also what of those things are strengths for you, and that can help hone your story's direction into a more funneled path, without feeling like you're missing out. Your story will be fine without all those extra bells and whistles. Sometimes we feel like we must cover it up with bells and whistles and make every story into a 3 part epic or it won't be looked at, but that isn't true. Instead it just distracts from what we do well, and can really discourage us when it isn't coming together.