When I first started practicing Tai Ji Chuan's internal skills, my joints would ring. In martial arts, it's normal to call qi to push bones. Generally, it doesn't ring after a period of time under the condition of sufficient gas. Judging from the progress of the exercise, it will be gone in about a month or two. Breathing against the trend requires abdominal muscle cooperation. After a long period of practice, when you exert your strength, you will feel one rush out of your abdomen, one rush out of your nose (if you shut up), and the other rush out along the meridians from where you exert your strength. Depending on the method of exerting force and the direction and position of exerting force, the sound of ha, hum and ha will be made. Other fists may make other sounds. In short, internal strength is subtle and difficult to explain.
Relatively speaking, silk winding is easier, I think. Test the degree of silk winding and see if you can dissolve each other's strength. If you practice, you can get rid of your opponent's attack without any effort. Listening skills practiced with pushing hands can turn enemy attacks into invisibility. You can freely perform Tai Chi actions such as grabbing and falling at high points.
If you want to know what it feels like, you can only find someone who can show you on the spot and feel it yourself. If you are in Beijing, I can show you the skills of winding silk to relax. Listen carefully. I know a little about this. You can't show your internal skills until you practice them.