My approach to weight loss comes from personal experience, having tried and done most diets under the sun and finally finding a sustainable way of feeling good about me and being healthy and active.
During the one2one sessions, either face-to-face or over Zoom or similar, there will be a thorough run-through of your current situation, feelings, and habits to tailor the approach to you. You will be expected to do homework as well as getting material to take home.
How many sessions you need depends on you and your circumstances but typically 3-6 sessions.