Did most of you have to invest in the help of a "professional" (trainer etc.) to learn to squat properly? I just started trying to squat again, this time I'm going past parallel with less weight, but I'm afraid of my form being wrong and injuring myself. My left knee used to wobble and crack, so I lowered the weight and focused on pushing my knees out, but I still have some soreness in my knees. Is the soreness normal or an indicator of my doing something wrong?
I wouldn't mind spending the money to hire a trainer just to show me how to spot, but I'd want someone who really knows correct form. I feel comfortable with pretty much all other lifts except for the squat. My knees always feel vulnerable so I never feel like I can push myself as much as I'd like to.
Any suggestions on how you learned and knew you were using the proper technique?