How to buy and play StellaVanity in 2021 [GAIJIN GUIDE]

This game isn't the easiest to find information on and I had a particularly difficult route from hearing about it to playing it, so I figured it might be helpful to create a quick 'n dirty guide for getting newcomers up to speed.
StellaVanity on English dlsite:
www.dlsite.com/home/work/=/pr...
StellaVanity Win10 patch:
drive.google.com/file/d/1AkKm...
StellaVanity at Shmups Wiki:
shmups.wiki/library/STELLAVAN...
Shop translations:
docs.google.com/document/d/1V...
Rank requirements guide:
translate.yandex.com/translat...
HUGE thank you to GalactaRay, Zaarock, and the STG Rev 2020 Discord, as well as the community around this game and the shmup community in general.

[@Xerxes126]

Thank you for this! The information in this guide was very useful, and will most certainly help me out in the future.
Although, I am a little intimidated to play it since I can't understand Japanese lol.
Also, The Electric Underground just made a good video recently about Stellavanity as well. Hopefully both your videos give the game more exposure!