There is nothing that you report in symptoms or imaging that appears to be an emergency. Your lower back most likely has an isthmic or degenerative spondylolisthesis at L5-S1 which is low grade and not compressing any neural structures (according to the report).
Your neck has a disc hernation at C6-7 which might have been causing some left arm symptoms in the past but you have recovered from that and have no upper extremity symptoms now.
The symptoms you have could be related to your spondylolisthesis but based upon the imaging report, I would agree that a good rehabilitation program would be beneficial. If these symptoms originate from your back, an epidural steroid injection might also be helpful.