I would love to learn more about altered states of consciousness during a BDSM session.

Relationship, family and household dynamics have always been one of the most fascinating concepts of BDSM to me and it's what i tend to focus on the most in my study of BDSM. The long-term 24/7 relationships, the ones that last 10, 20, 30 years in a D/s or M/s dynamic and the larger families and households are of chief interest. i'm always most interested in learning about the aspects of emotional and mental safety in BDSM. In learning BDSM we tend to focus so much on physical safety and learning not to hurt someone physically is important, of course. But, in general, with obvious severe exceptions of permanent injury or death, physical wounds like cuts and bruises and burns will heal much more easily than emotional, mental, psychological ones and there are salves, creams, medicines, ice packs and heating pads and things we can do for the physical pain. If it's really serious, we can go to a doctor, but it's not as easy to treat the non-physical injuries. And a physical scar (at least an undesired, unintentional or non-consensual one) will often be accompanied by a non-physical scar that will probably be much more damaging in the long run. Hurt feelings, broken hearts, severed trust, bruised egos, insecurities, injured psyches. How do we avoid them and how to we treat them? Not even delving into the significant concern of abuse, but simply accidentally or incidentally hurting someone as humans are wont to do even in vanilla scenarios but to which we open ourselves even more fully in BDSM. These are the aspects of BDSM i'd like to learn the most about: successful long-term, serious relationships and how to play safely with hearts and minds and psyches as well as bodies.
For the more fun stuff, the next things on my list are cell popping and fire cupping and other forms of heat and fire play.

Ropes...knots bondage, suspension.

How to tie all those fancy knots

Impact play! I want to know how each device differs from others in sensation, intensity, etc.

The Japanese rope bondage. I think that would be great to actually learn how to make all those knots to use at my own leisure.

The custom furniture used for bondage--where to buy, build, how to use.

Domination.
I want to dom someone so badly... at least try it out see how it goes ; or learn the ropes hardcore to see if it's something i'd really be interested in introducing to a relationship.

Long term orgasm denial, long term edging. Etc.