Every spawnable item in the game has 2 (or 3) set locations it’ll randomly pick to spawn. For the first weapon, it’ll be either 1) directly behind where you start, to the right down the long hallway and opens into a larger room. 2) Go to the left where you start, directly to the right, and around the next corner to the right again.
I played with the map so much that in hindsight I really should have added a mini map or something in the player’s journal.
Thank you for trying though! As you get more things, more and more unlocks and you can explore even more.