Yes. Pressure upon the crown takes place before the full opening.
Many, many, many experiences come. It is best not to get too much into analysing, understanding them else one can easily get distracted or the ego may get puffed up. It is like getting delayed by the scenery on the way. Stay focused on giving oneself more and more to the Divine, growing in faith, sincerity, love and surrender, equanimity and peace. Open more and more to Her Grace. Inner Peace and Equanimity are far more important than the experiences or visions, etc. All the rest will grow in due course of time.
The Force does not choose. It is the Divine who chooses because He sees some possibility in us. The potter chooses mud of a particular type to shape a vessel for which a particular mud works best.
Affectionately,
Alok Da


