I finally went and used a guide to find all those aranara. Holy shit that took a good portion of my Saturday. I didn't know I had even more of those quests and had to find some of the pictures cause I got lazy. I just finished the old man's quest and now I finally completed all the quests, got the 6 checkmarks in that book, got 100% in sumeru too. Man I can't imagine doing all the aranana quests in a row.