I have a roommate that I dont know for sure knows I’m a magician so to keep it a hopeful secret here are two ways I do magick.
1: Whisper. It can be filled with as much intent but it is quiet. I use this when I chant a Daemons name to build up energy and I do get results.
2: Imagine. The other thing you can do is imagine yourself doing rituals, sit down and imagine you getting up and doing the ritual.
The latter was something I got from a “Golden Dawn” video. The person said “I do it in my car when I’m stuck in traffic”. I also use this when I’m stressed and need to reset at work so I’ll imagine kneeling in darkness and quiet myself. As for your question I did do the LBRP and I got a strange result. I was working with Belial and I foolishly did this, when I was at the west point (a.k.a. my altar) I did not think about what I was doing and SLAM my door shut with force. I did have my window open but it had not done this all day so I know I fucked up. So a word caution cover consecrated items.
I hope these help. 