@Novamia

I drew episode one on a whim. I didn’t do any planning other than the dialogue, making up character designs and poses/panel layouts as I went. After that I decided some planning was important, so I wrote the dialogue for the first 20 episodes in script form and loosely planned out all three arcs on google docs. Still don't have some character designs (like the main villain) and I still don't plan comic layouts beforehand. This method has worked pretty well for me.
But having some direction is really important in my opinion so you don't drag anything out or realized that something doesn't work and have to redo everything