how long does it take for a settlement from the defendant

It could take years.  I could take days.  It depends on a large number of variable factors including the insurance company, the adjuster, the policy limits, the liability, the causation, the injuries, the damages, the medical treatment, the medical providers, offsetting factors, circumstances of the accident, previous accidents and injuries, and the list goes on and on.  In any case, you should not try to handle a case on your own. You need an experienced personal injury attorney with a good track record. I suggest speaking with any attorney who answers you here or using the Find a Lawyer feature of this site or you can contace me for further assistance. I wish you well and the best of luck.