unless your title is a portmanteau, in a different language, or just completely made up - chances are you're gonna have a similar name to something else xD like one of mine is in a different language, but in english it's a word away from the same as King's Folly's title :')
I sat on my comic url for around a year? because I was afraid someone else would take the url I was planning after seeing someone use a url that was different than the title of their comic haha. I just put a placeholder image for the icon and put that the comic was still in the works as a description if anyone just so happened to stumble upon it (which someone did, and they ended up subbing for some reason?).
I don't particularly know if there's a rule against squatting on urls, but series don't show up publicly on your profile or in search (?) if it doesn't have any episodes.