You can read the full translated LN on Fans Translations. I read it a couple of years ago and loved it. But when I tried looking for the website again today, it wouldn't load, which is annoying bc that was the website I usually used, trust me when I say that it had lots of great LNs. You can still read it on "Lets Become a Novelist"/"ncode.syousetsu", like most LNs, but you'll have to use a translator. Here's the link https://ncode.syosetu.com/n6110gb/ you can also just search the JP name online and it'll be the first link that pops up, of which you can find the JP name in NovelUpdates, or if you don't want to bother looking for it "軍人少女、皇立魔法学園に潜入することになりました。〜乙女ゲーム？ そんなの聞いてませんけど？〜"
I like it so far, looking forward to future updates *crossing my fingers it continues* (￣∇￣") anyone know if this is based on a light novel?