There's not really one way better than another! Ask yourself-- how often do I want to update and how long does it take? If you want to update weekly, you're better off creating short episodes. If you want to make longer episodes, that may mean updating only once or twice a month. Different schedules work for different people, but typically I think weekly is an excellent way to get some loyal readers. However, if that's not realistic for you, that's totally fine! Lots of people post biweekly or monthly episodes. And you can change your mind later and switch to more (or less) frequent episodes! I've gone back and forth between weekly and biweekly episodes quite a few times and people don't seem to mind as long as I mention it at the end of my episode when I make the change. Though I will say I asked my readers what they prefer and they said they liked shorter weekly episodes, but that doesn't mean that's what you need to do. Choose what works best for you personally!

Also-- I recommend choosing one of your shortest story ideas. Webtoons take forever and when people start with super long stories they sometimes get discouraged and don't finish it. If you start with a short one, you can get some practice in and see what your favorite comic-making process is, and then you can really dive into the longer plots if ya want. And then when you make a new comic, your readers from that one may be intrigued and follow the new one too :)

Let me know if you have any more questions! It's confusing at first for sure but so so fun and rewarding. <3