How effective are the weight loss injections?

I have been gradually adjusting my diet lately, but weight changes are slower than expected, so I am looking into information regarding weight loss injections. I am wondering if they can help control my food intake rather than just reducing the number on the scale. Since I understand that the effects of weight loss injections vary from person to person, I would like to know exactly where I can feel the changes. My biggest concern while considering the procedure is whether it will cause discomfort severe enough to make me unable to eat at all. I tend to eat a lot, so I would like to be able to control my food intake naturally. I am also curious whether the effects of the injections become noticeable immediately or if it takes a certain period of time. Rather than setting unrealistic goals from the start, I would like to manage my weight slowly alongside lifestyle changes; what should I discuss during a consultation? Please share any experiences or precautions from those who have looked into this with similar concerns.