I've been self-inquiring for almost two months now, both on (after some concentration) and off-cushion. It's a nice practice which goes well with concentration, and alternately with bare awareness / noting.

So far Self-Inquiry systematically leads to glimpses of a vast openness in the background (often literaly in the back), a deep and obvious -but yet elusive- sense of being. Sometimes it's awareness in a sense of "just feeling / hearing / seeing", in the flesh.

A few powerful experiences also, related in my practice log, such as :
- seeing "I" face to face
- feeling the whole world inside me / seeing "I" in the whole world
- some deep insights in 3 characteristics

This practice is driving me nuts in a way, because I can't find any way to spot something that is, by nature, imperceptible. Everytime I focus on a sense of presence, I have to admit that which I can perceive, is not "I" and so I step back further and further but it ends up cycling like a dog chasing its own tale.
I can feel and intuit that it's here, just right under my nose, but no real sense of realizing it undoubtly so far.

I'd like to be sure my Self-Inquiry practice is right: I ask "Who am I?", then drops everything and focus my awareness on the deepest sense of "I / me / presence" I can find. Then as I perceive stuff, I ask "Who is perceiving that? -Me -Who am I?" and so on.

I just stay with the sense of "I", scrutinizing it, discriminating periodically so not to be lost on perceiving stuff which are not "I". Is it good practice? What's next, pursuing such effort and wait for the grace to happen?

Any pointers or help will be much welcomed.