I don’t think FIR would be the potent action for now. But I read a lawyer suggesting the General Diary option in another post. You can explore that option.
Aur haa bhai, CCTV install karwa lo. Ek wild idea bhi hai, poster chhapwa do mentioning all the details. Isse neighbours ko bhi sab pata rahega aur wo log baad me interfere bhi nhi karenge