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I hope someone builds a computer vision system to provide audio feedback for correct form. I often feel that I have zero self awareness for body position, and it makes me worried to work out alone.

Start with -just- the bar.

Or get Starting Strength, by Mark Rippetoe, which has about 70 pages of instructions and diagrams on the correct form of each lift.

Or find a gym that has a personal trainer willing to teach you the proper form.

Or do it, record yourself with a camera of some sort, and find a community of weightlifting people (/r/fitness welcomes this) to correct your form.

Read starting strength. Its a small, cheap book, and it goes into more detail on form than you will probably need. It has chapters on each of the major lifts and I used to read it on my phone (kindle app) before/during the workout at the gym until I got everything right, using low weights of course.