As a beginner without a "reasonable teacher", self-study or casual study of Tai Ji Chuan will lead to posture deviation. In addition, improper training intensity and length of time will undoubtedly damage health. From this perspective, the effect of brisk walking is better than that of Tai Ji Chuan.
And there are formal channels to learn Tai Ji Chuan, Tai Ji Chuan's health care effect is more comprehensive than walking (* attention! More comprehensive. And which is better, Tai Ji Chuan or Jianbu, ultimately depends on everyone's learning methods and operation methods)
No matter what kind of regimen, it is effective to promote physical health under the correct and suitable operation. As for which effect is better, it ultimately depends on everyone's learning methods and operation methods-for example, playing Tai Chi, you will feel sleepy and bored, so you might as well not play.
On a broader level, health preservation is a process that permeates every little detail of life. It includes not only exercise methods such as Tai Ji Chuan and Jianbu, but also emotional methods to adjust emotions, music methods to listen to comfortable music to adjust body and mind, and diet methods to adjust diet structure.
Finally, I wish you good health and smooth work. The above is my opinion, and there may be mistakes and omissions. Please distinguish and choose according to personal situation and objective situation. If there are different opinions, we can discuss them further.