Finding my motivation

Over the last year I have had bicep tendinitis, ulnar nerve neuritis, some crazy rib disfunction, a tendon tear, bursitis, and arthritis and finally golfers elbow. All in my left arm/shoulder. I finally am pain free except the golfers elbow which is tolerable compared to everything else. I have finally come to terms with the fact that I haven't had a regular exercise routine in almost 7 years. I will admit I am not much over weight. I would like to lose a total of 30lbs. I hear a lot of "you don't need to exercise you are perfect just the way you are" and "you need to learn to love your body the way it is" which is sweet except it only encourages me to be lazy. Finally in my 12th visit to physical therapy I had a breath of fresh air. A moment where I cringed but was relieved. My physical therapist said "are you ready for my final thoughts?" I took a deep breath and nodded yes and he said "you are weak." He watched me struggle for weeks with the weights and resistance training. He suggested I maintain a healthy weight and pick up a regular strengthening routine or I will just continue to hurt myself. Today I found several YouTube videos that look simple enough to stick to. I stacked wood all by myself instead of waiting for my kids to come home and help me. I logged over 13,000 steps. I finally broke my plateau I've been stuck on for months. I am looking forward to not being weak some day soon.