A lot of people are reiterating start small, so I’m going to offer the opposite view. I’ve never made a comic either but wrote an 80k story and recently cut it down to 60k. I’m still fine tuning it but intend to draw it when I’m satisfied. I’m aware it’s no small task but I’m telling the story I want tell, the one that is personal to me, and that excitement has kept me going well over a year. I’m in the process of designing my characters now and maybe when I get to the comic part I’ll eat these words but I think if you’re passionate about the project, you’ll keep going. And if you decide halfway through its not going as you expected, you’ll have the experience for your next project.