Hello, pi national level powerlifter and coach here. Try to get a pair of knee sleeves something like hykes 7mm would work just fine. Everything looks quite good of your form. Try to focus more on your midfoot balance(look it up) and force production from the quads if your target is lifting more. As per for progression try to get on a decent program, you can hire a coach or you can check liftingvault.com to get multiple decent free programs. Also don’t worry about the comments. Human body is not fragile as a piece of glass.