Weakness and tingling (paresthesias) are important signs of nerve root compression and dysfunction. Without examining you myself, I cannot comment on the significance of your motor weakness and the true risk to your nerve root.
Your MRI report does corroborate the source of your symptoms “(C5-6) This causes a moderate degree of cord compression. The C6 nerve roots are compressed bilaterally particularly on the left. Uncovertebral and facet hypertrophy cause marked left and moderate right foraminal narrowing”.
Generally with weakness and paresthesias, surgery should be considered. To add to this problem, you have central canal stenosis (“This causes a moderate degree of cord compression”). This means you are at risk for myelopathy or a central cord injury (see website for those descriptions).
You probably are a good candidate for an ACDF (fusion) of the C5-6 level. See a surgeon soon for a consultation.
Donald Corenman, MD, DC is a highly-regarded spine surgeon, considered an expert in the area of neck and back pain. Trained as both a Medical Doctor and Doctor of Chiropractic, Dr. Corenman earned academic appointments as Clinical Assistant Professor and Assistant Professor of Orthopaedic Surgery at the University of Colorado Health Sciences Center, and his research on spine surgery and rehabilitation has resulted in the publication of multiple peer-reviewed articles and two books.