hey guys i got stuck at the "find the garden's secret" part any help?

i found some bugs so i'm gonna list em here - during the first cutscene i pressed something (i think i alt tabbed or took the game out of fullscreen) and then the main character moved to the bottom right of the screen and i could not progress at all and had to restart. to be fair i haven't been able to replicate this bug but i did take a screenshot - when you first enter the building through the opening in the gate if you press e while the screen is fading to black y...

i'm stuck at the beginning, in the "find out what happenned", i can't find the theacher's birthday, i can't talk to the girl in the middle of the hall, i can't open the sewer on the bathroom. i don't know what i'm doing wrong ;;;

says 1 2 3 input ive found the teachers date of birth already but it wont let me do the thing

i read the gardener's note and the book inside the shed, maybe i can't re-read the part that was important for me to find the code, please send code