Concerned about a square jaw and jaw muscles in my 30s, I have questions before consulting about jaw Botox.

Now that I’m in my 30s, I’ve noticed my jaw angle and the area below my cheeks look prominent in profile photos, so I’m looking into jaw Botox. I have a habit of clenching my teeth and often experience jaw muscle stiffness in the mornings; I’m wondering if I qualify for a square jaw Botox consultation in this situation. I’ve heard that it’s important to distinguish between an angular appearance caused by bone structure and one caused by developed muscles, so I’d like to know how this is verified during the consultation. I would also like to confirm in advance how long it typically takes for the effects to appear, the duration of the results, and the interval between re-treatments. I’m also concerned about my chewing strength weakening or my facial contours becoming unnatural, so I’d like to know how the dosage is determined. Please let me know if I can have both the consultation and the procedure on the same day after work. The attached image is an AI-generated reference image.