How to start and in what form? Ok, I’ll start with words –
Your conscious mind is the sense of identity/self as separate from everything around it. It is the flow of awareness you pay attention to, filtering and deciding; this is the part of you that is directly aware of choosing, moving an arm is an example of these direct decisions. It is aware of thoughts and emotions as consequences, as, if you like, sensations but not always aware of their sources. These experiences can give the impression of control. Your conscious self often fools itself into thinking it puts thoughts and feelings together in linear forms, that is simplistic cause and effect logic.
The subconscious might be called ‘subliminal’ because it is below the light of attention or consciousness. If you have the right skills, namely various types of trance, you can focus on subconscious processes. The line between the conscious and subconscious is fuzzy. At the border, some things slip backwards and forwards according to habit, convenience and sometimes for efficiency sake. These include associative and poetic forms of thinking that underlie the assumptions that shape conscious experiences. Habits that have become reflexes like driving can be subconscious that you can pay attention to if you have a reason. It can be affected by indirect means through imagination. It is how history teaches us for better or worse by creating frames and shapes for our perceptions. Various bodily functions are responsive to immediate experiences that map the boundaries between the conscious and subconscious with breathing and posture close to the fuzziness, while heartbeat, temperature, blood pressure etc. are in the centre of the subconscious. ou can affect them with self-hypnosis, meditation and biofeedback.
To me, unconscious bodily functions are less affected by immediate experience. But instead are affected over time like bones, liver and kidney function. These can be affected by imagination and focus only when immersed over time as happens in physical experiences of lifestyle. Your subconscious habits and processes lay down longterm tracks in your body can effect your unconscious. Changing those will transform your unconscious processes.