And after another week of trying, I made some other progress:

My dreams are now much more vivid and clear. Last night in some confusing dream ( I was in a restaurant eating salad, I met at the same time my old math-teacher who talked to his husband like a baby )i wanted to do another RC (nose plug) but I didn't performed it, because I couldn't do it discretely

Does anyone knows some other RC which can be performed in hidden manner?