Personally, I don’t recommend looking up everything and/or adding them to Anki decks. If you’re reasonably sure you’ve got the gist of the story or article, just keep on reading. I used to look up everything, it was slow and painful and made me not want to do more of it. So now I only look up words or grammar if I really have no idea what’s going on. I enoy the process more, which means I do more of it, which I think is more important than whether or not my understanding is 100% correct.
No doubt sometimes I’m completely wrong, but on balance I find my reading improving faster with this approach. And I second the recommendation for からかい上手の高木さん as a great beginner manga, I found it easier to follow than よつばと!. Some of the colloquial grammar is tricky but I found it easy to infer the basic meaning of the sentences, even if i haven’t picked up every nuance.