you know of webtoon, so I'll skip that one
comicfury - most creator friendly (you get a website for free for your comic and you can edit its html, also very friendly to adult series) but with way smaller audience than webtoon/tapas (mostly due to it not having a mobile app and being a passion project of one person as far as I know without a budget to spam ads :P)
I feel like more western, cartoony comics in page format are most popular there
flowfo - similair deal as comicfury, pretty much no censorship, so no mobile app and so smaller readerbase, it is mostly home to mature queer comics, it also lets you put parts of your comic behind a patreon-like paywall
globalcomix - very creator friendly and most active when it comes to promoting creators, censorship level like it used to be on tapas until apple upped the censorship to ridiculous level, they recently added a mobile app which really boosted the readerbase, there are also traditionally published comics on this site from publishers like top cow, with a clear distinction between those and stuff posted by users but not in a way that hides the user published ones like webtoon and tapas kinda do...
itch.io - mostly a platform for indie games but you can also post pdfs on it - good place for when you've got some more stuff finished
I also use mangatoon and webcomicsapp - both have a similair level of censorship as webtoon and tapas mobile app but requires your stuff to go through manual review before it goes live, big readerbase but your stuff is also very likely to be buried under the sea of their translated licensed works, both are more for scroll type comics