I enjoyed this series. I liked how Akina started alone, made a few friends, then reconnected with old friends, then connected with their her friend's friends, then her brother's friends, etc. It expanded from a small cast of 3 people to this large web of loose associations and friend-of-friends. And seeing Akina form real relationships with many of those folks over the course of the series was quite fun. I also liked the progression of Akina's otaku-ness from "I don't know anything" to only knowing prepure, to only knowing games+prepure, to doujinshi, to conventions, to cosplay, to writing fanfiction, to publishing fanfiction. It felt like a good progression.
That said, this manga is not without faults. The biggest issue, as others have also said, was the pacing. I feel like this manga was wayyyy too slow in how it paced the first ~8 volumes of its story, and then tried to wrap everything up in the last volume. This caused some subplots to get a strong resolution, e.g. Hibari's double-life subplot, while other subplots are left completely dangling, e.g. Akina never comes out as as an otaku to her brother or old friends. The bad pacing ties in with my other big issue: the romance subplot, and how it didn't go anywhere for 46.5 of the 47 chapters. Like, I get that this isn't really a romance series; its more a coming of age story about discovering a new hobby. But so many chapters and scenes are basically just "Kaede does cute thing, Akina is in love." So you can't say the romance is unimportant, its just under-developed.
IMO they either should have ditched the romance in favor of more friend stories and better pacing on the otaku plotline, or they should have replaced the huge number of pages spent ogling Kaede on actual progression to their relationship. And preferably it would be bidirectional progression. Like, even in the ending where Kaede responds to Akina's love, it feels weirdly one-sided. Specifically, it feels like Kaede isn't actually in romantic love with Akina, but loves her as a friend, and is open to trying out a lesbian relationship so she can compare it with yuri manga. Granted, she might develop romantic feelings down the line, but this isn't an ideal way to end a 9 volume story. That one-sided vibe would not have happened had we better established Kaede's feelings beyond "thinks Akina is a cute friend."
Overall I liked this manga, but I can't help but picture a better version in which the fake otaku and romance plotlines progress at the same rate as Akina's friendships and otaku level. You could have had Akina admit her being an otaku around Volume 5, with the remaining 4 volumes are focused on what she does now that she's embraced her true nature, e.g. writing doujinshi, pulling other people into otaku culture, etc. Many of the Volume 6-9 plotlines still work, you just have to replace all the pages wasted on fake otaku drama with other conflicts, like "will anyone like my doujinshi." You could also have Akina admit her feelings for Kaede to herself when she becomes more self aware in volume 5, spend 1-2 volumes on her working up the courage to admit those feelings to Kaede, and then had Akina confess. Then in the last few volumes just have them do cute low-stress relationship stuff in the background while wrapping up other storylines.
But even if I didn't get the story I wanted, it was an enjoyable ride. Maybe I should take a page from Akina and write a fanfic to flesh out the ending more