Gonna be honest: it sucks, but it is vital that you change your mindset because the problem is, with this mindset it'll never be "enough" attention.
Right now you have close to zero attention, and yeah you will get more after a while if you regularly publish a comic. But human brains are sneaky, once you get some, that some will seem like a baseline requirement after even a week or two. Even if you get popular, thinking like this is what leads people to say "i only got 100k views, i feel so ignored".
Making art, the thing you like most about yourself, doesn't need other people to be interested to make it valid. You don't have to be happy if something doesn't get that much attention online but you do have to feel neutral about it, otherwise it will destroy you and make you feel the same way you do now, even if you get thousands of people who love your stuff. I know you said "you can't just do it for yourself"... But that's kind of what differenciates the people who finish their comic and those who give up after a lack of attention. You love your characters and story and you want them to exist through a story that is real and readable? Do it for them, if not for you. Love them enough to give them life.
TL;DR: you shouldn't worry that no one will read your comic, because with how you're thinking right now no amount of people reading will fill the hole that you're digging in your heart. Your value is not just how people react to your art, and you need to work out the mental issues that you have independantly of online attention.