Oman, I somehow missed this thread when it was new, but this is the best thing I've read all year
This gem of an advice has probably already been shared (but I only skimmed the first 40ish posts, also great advice! Don't bother reading the whole thread!) so:
Definitely when you want to get into comics, start out with the longest story possible. 100 Chapters? NOVICE! 500 or bust. The closer you get to 1,000 chapters the closer humanity gets to salvation. "my favorite manga series has about that many chapters, so my story should too!" It's only natural! Don't worry about the story's pacing or the fact that you can't bust out a chapter a week/month like they do, it'll be fiiiiiiiine.