First of all: You have nice art work. That is going to help.
In this second part, I am only offering supposition. WebToons has creators, readers, and critics. Critics follow many series just by looking for fresh updates. I am not a critic, so I can only infer their motives. I am a creator/reader.
You can gather dozens to hundreds of readers & critics on Webtoons. But you need thousands of subscribers to qualify for revenue. WebToons limits the number of subscriptions each reader can follow.
Tapas lets you accumulate revenue with a much lower subscriber count (and lets readers earn ink by watching ads), but you need a huge reader base to earn enough to withdrawal funds. On Tapas, you might find creator/readers on the forums. Helpful in reaching the subscriber limits, but not part of the devoted readership that you really need.
I suggest you post tapas updates in forum threads (use links to make it easy to find, and ask for subscribers). I think you will be successful because your series is high quality.