Clearly, you have a number of years of skiing experience. Based on your original post, my first suggestion is always going to be taking lessons. Find an instructor you like. Hopefully, they or someone else can capture some video of you skiing during the lesson(s). Video of yourself makes it easier to see what it is you may be doing wrong, or what you could be doing differently. Video will also help in making more sense of what the instructor is trying to teach you. After that, you will be able to "feel" or sense when you're not doing something that you want to be doing. Noisy skis tell no lies, unless the skid is on purpose as a skill or tactic you've chosen to employ in a given situation.
Your subsequent post referencing the cost of a private lesson made me think of a YouTube video I watched some time ago that might be right up your alley. Before I mention it, I must throw out a disclaimer because I do not wish to offend anyone who might read this. I do not advocate for any one method, style, technique or philosophy when it comes to skiing. I am a recreational skier who believes that there is knowledge to be gleaned from many different schools of thought when it comes to skiing. Kind of like martial arts. There are many different disciplines...who am I to say if one is better than another. Skiing is, and as far as I know, has always been, as much about self expression as it is about solid fundamentals on the types of terrain you wish to ski. If you complete a run with a big Cheshire Cat grin on your face...keep doing what cha did!!!
Anyhow, the video can be found on YouTube. Type in Lito Tejada-Flores. The video is his 3rd in the series, and is about 53 minutes in length. There is some stuff he talks about, that goes directly to the crux of your original post. Maybe you'll find it useful, maybe ya won't. In any case, I wish you the best of luck.