What criteria should be used to select obesity injections?

I've been looking into weight loss injections lately for weight management, but there are so many types that I'm not sure what criteria to use. Simply comparing prices doesn't seem sufficient, as ingredients and treatment schedules likely differ, and effectiveness probably varies from person to person. If I'm looking into weight loss injections for the first time, what should I check first? I plan to combine this with diet and exercise, so I'm looking for a consistent approach to management without overdoing it. When I look at reviews, I see people who are satisfied and others who say the results weren't as good as expected, which makes me even more conflicted. I'm curious to know how long those who have actually used these treatments managed and how much it cost. Would it be helpful to get a consultation regarding who is recommended for them and the treatment schedule when I first start?