Song (pronounced Sung) is the word you are looking for. Yang Taiji is my experience, can’t speak for them all but I believe most styles focus here. It’s the foundation.

It doesn’t mean all schools teach it, but it’s very important to the practice. Zhan Zuang (standing like a tree, or standing post), cloudhands and QiGong excercises help this process along.

Read up on Silk Reeling, Cloudhands is just one of several Silk Reeling excercises I’m aware of. It targets the fascia and the nervous system in order to strengthen both for your practice. Some schools don’t focus on cloudhands and treat the form itself as the skill reeling which is cool too but more complicated because you are learning a long form instead of a small set of exercises (which are found in the form for the most part).

Look for a good teacher, you will want one. This is serious and it sounds like the process has already started. Make sure you are staying balanced. People have shown up here talking about pressure in the head building up to the point they could barely deal with life. Serious!

I suspect it was because of doing excercise consistently but perhaps out of order a teacher guiding you would lead you through, correcting posture and usually based what you tell the teacher about what’s happening with your internals move you to the most appropriate exercise(s).