The Ready State Virtual Mobility Coach is like having a virtual Kelly Starrett in your pocket.
If you are injured or have had trauma to your back you should not deadlift or squat until you are cleared through your doctor and P and your injury is healed.
With proper technique deadlifts, squats do not harm your low back.
Problems can occur when proper technique is not used when performing these lifts.
I recommend scheduling one on one sessions with a coach who has solid knowledge about the technique and experience teaching these skills.