It can generally take up to 6 months for ligaments to completely heal. Not to mention in your case, you probably had some significant muscular/soft tissue damage to go along with the ligament damage. What testing was done at the ER? X-ray? MRI?
It may take quite a while to return to full strength and ability to perform squats/deads, etc. Nothing wrong with dropping the weight until your body is ready. Body weight and single leg exercises should be within reason for you to perform as well. If the exercise causes pain, don't do it.