Breaking lease before move in date in louisiana

Contact the lease holder, explain the situation and see if they'll accommodate.

If I had to guess they'll let him. But the deposit is probably lost and depending on the lease wording an additional fee as well.

Russians hacked me, I didn't sign shite online.

if kid is under 18, the agreement is not binding

That doesn't sound right and I would be willing to bet that the property owner cannot hold him to that. From what I am gathering he signed a lease online which he thought was just a form to run his credit and background. With no physical signature no deposit money collected I say just call the property owner or complex up tell them that the kid misunderstood what he was agreeing to online and try to settle it that way. I would imagine that if no deposit money was collected and the kid did not go to the property and view it and sign an actual lease that no reasonable judge would hold the online signing as a binding agreement. Not bright on both parties here.