Reading books healing back pain by Dr. Sarno
And read through Alan way out book
Read TMS recovery program in this forum
Trying to doing normal activities by reinforcing the brain that the pain or sensation in my back is just lack of oxygen or misinterpreting signal from brain
Breathing exercises
Safety messages
Reading success stories and YouTube videos
Reading and engaging in TMS work are two different things. Dr. Sarno assigns work to do, to address symptoms.
He asks you to look at your personality traits and note how they create stress, to look at past and present stressors or another way to put it is to look at your internal conflicts. A few people can just "think" about them, but most people engage in journaling exercises to help foster the vulnerability needed to look deeply into oneself. He states "think psychologically" - and suggests we look at repressed emotions such as anger/rage.
Breathing exercises are great, as is mediation, somatic tracking and anything else that will help calm your nervous system, but generally these aren't super successful without doing the inner work at the same time.
Drop any idea that you are focusing on "lack of oxygen" or "Misinterpreting signals" - this focuses on what is wrong, instead of focusing on the fact there is nothing wrong. You want to focus on "nothing wrong" and things like "temporarily feeling sensations" etc. You have to let the brain know you truly know what is up.
Note: if you have noticed or thought perhaps anxiety plays a greater part in your life, read any book by Claire Weekes. She has amazing techniques that you also directly apply to common TMS thought patterns etc. I found her amazingly helpful.
I continue to listen to youtube videos/podcasts, it's a great idea to reinforce the work. Sometimes there are subtleties we just aren't ready to hear until we are ready to hear them (funny how the mind works).
Keep going. Experiement with some new techniques and begin engaging in the real work. The free program called the Structured Educational Program is a great guideline to doing the inner work. I love Tanner Murtaugh's TMS channel on youtube. He uses both Alan Gordon's Pain Reprocessing AND the inner work necessary for long term progress for most people.