Yes, brother Upasana or any Sadhana need to be taken from Guru.
After getting Upasana from Guru you have no restrictions in outside but your should be restrict yourself in inside.
And there is more which I am not permitted to disclose.
Further, please refer "KAHI BIDHI KARU UPASANA" chapter from "PHIR DOOR KAHIN PAYAL KHANKI" written by Poojya Gurudev.
Jai Gurudev
Santosh Kumar Panda