Your comic's contents are fine, they are fun and relatable. The only problem is your art is not good enough, I know I'm being rude here but that's all the reason why the readers don't stay with you.
Since you already feel hopeless anyway, you should put your comic on hiatus for now, then spend some months focus on improving your art, especially pose and expression in your case, and build another main character, more original and more cute. Try to learn from popular comic/manga with the same genre, recommend Gokicha and Chi's Sweet Home.
When you think you are good enough, go to webtoons, create a new comic with the old contents of chapter 1 from your old comic, and post it ( around after 12PM, before 6PM EST ). If you get 100subs after a day, go back to your old comic, delete all the chapters and rerun everything again with your new art, or you can just go with the new comic, 1800 is not that much anyway. If less than that, that's mean most of the reader on webtoons do not like it and will not like it, delete it, go to the mountain, train, and try again later.