Blue Archive reading order
The canon timeline, also known as the release schedule. I personally believe this is the right way to read Blue Archive™, but be yourself.
If you find something odd about certain parts of the story you probably missed a small detail from an earlier event (or Hina's momotalk).
Main stories only:
Volume 1 C1-2 > V2C1 > V3C1-3 > V4C1 > V3C4 > VolEX C1 E1-13* > V2C2 > Volume F > V4C2 > V5C1 > V1C3 > Vol EX C2 E1-31 > V5C2 > V6C1-3
* The last 3 episodes (E14-16) happen after volume F.
Including the events (watching event promos is optional, but I would recommend watching the raid intros and PVs):
PV1
Volume 1 C1–2 > Binah Intro > Izuna event
PV2 > Chesed Intro > Shiro & Kuro Intro
Volume 2 C1 > Cherino event > Hina’s momotalk
Volume 3 C1–2 > Hieronymus Intro > Trinity Summer 1 > Gehenna Summer > Kaitenger Intro > Shunny event > Bunny Chasers > Perorodzilla Intro
VolEX C1 E1–13 > Hot Springs event
Volume 3 C3 > NY Problem Solvers 68 > Wakamo Valentine event* > Hod Intro > Ui event
*The Wakamo event is tough, as it features the (unnerfed) EX challenges from previous events as story stages. It's fine to skip the event until later.
PV3
Volume 4 C1 > Michiru event
Volume 3 C4 > Abydos summer > Hyakkiyako summer > ASS club event > Sports event Pt 1 > Sports event Pt 2 > Goz Intro
Volume 2 C2 (I love this PV) > Christmas nurses > NY Gourmets > Aru’s momotalk
PV4
Volume F > Maid gamers
PV4.5 > Rumi event
Volume 4 C2 > summer SRT > Gregorius Intro > summer Trinity 2 > Meru event > Hovercraft Intro > Trip‑trap train
Volume 5 C1 > Part 1 > Part 2 > Myouki Kurokage Intro
VolEX C1 E14–16 > Camping hackers > Dress Hina event > Hina animation
PV5
Volume 1 C3 > Dress Aru event > Umika event > Link > Band ASS event > Say Bing (PV animation) > Sheside Outside (PV animation) > Qipao Russian event > Kisaki event (PV animation) > Trinity Idoru event
VolEX C2 E1–12 > Pajama event > Millennium EXPO > Geburah Intro
VolEX C2 E13–22 > Hina Kisaki mini story > Juri event > Sumire event > Shupogaki event
PV6
Volume 5 C2 (1) > Hyakkaryouran summer (1) (2) (3) > Tea Party Summer > Eri event
Volume 6 C1 > Miyo event
Volume 6 C2 > Suzumi alt!!!! featuring Uzawa Reisa event > Yesod intro
Volume 6 C3 > Takane & Yakumo event
You can also read the story by volume. Do the group stories whenever you feel like it.
(old way of formatting, just for preservation sake (the trve release order))