Yes, Manapa, mind is the ground of being, mind is God, mind is nibbana, when perceived correctly.
To say there is nothing separating the everyday from nibbana is like saying there are no waves on the ocean. A wave is nothing permanent or essential, it is the motion of water; at no moment is there anything that can be said to be a wave, there is only water, itself made up of waves of motion or vibration, as is all matter, though there is nothing in motion but motion itself. If we see consciousness in this light, when movement ceases, there is nibbana. It is what is beneath or beyond movement in my model, what is left when the waves flatline, it is what is irreducible.
We examine the movement of consciousness through vispassana meditation. Through examination, motion ceases of its own accord, not because we still it, but because we realise it is empty, that there is no such movement. Movement can only occur in relative terms; realising the ground of being is to realise that from the perspective of the whole, there is no movement. Then there is only the ease of falling in love.
This doesn't mean anything changes though - a lot of people imagine that everything goes white and merges in nibbana, but that's kind of missing the point. Experiences like this can be had, but eventually we learn not to cling to them or see them as special.
Not twice, not three times, not once,
the wheel is turning.