Teasers work well. I've only done a teaser and some crude Prologue pages for mine and I've already broken 70 on Tapas and 100 on Webtoon, and my first actual chapter page is due to release soon (but hasn't yet).
Teasers help get the idea of the comic out quick and easy. I'm sure there's plenty of people who'd love to read your new comic, they just don't know it yet.