OP — my 2 cents:
It's great that you're working out a plan before committing to this, or any, GLP medication. As others have said, nobody can predict how you'll respond until you actually start. You could turn out to be a slow responder or a fast one, you could run into assorted side effects, or you could find the medication simply isn't a fit for you. However much research you've done, what you experience will be your own.
Let's run the numbers: an R10 kit holds 100mg of medication, and however you slice it, that's the total you have to work with. So where do you begin — 0.5mg, 1mg, or 2mg? Say you were to follow the titration protocol used in the trials, which calls for a structured step-up every four weeks, here's how it plays out:
Weeks 1- 4: 2mg weekly, which is 8mg all told
Weeks 5-8: at 4mg, so 16mg all told
Weeks 9-12: 8mg, working out to 32mg
Weeks 13-16: 12mg, giving 48mg in total
With a 104 mg total you're looking at just under four months of supply, though how you dose and how you schedule it is ultimately your call. You'll pick a starting dose — 0.5, 1, or 2, say — aiming to bring the medication in gradually so you can watch for side effects. Results differ; the weight loss might be small or it might be large, and there's no telling which. After the first month you reassess. If the dose is doing its job, why change it until you stall? When the stall comes, that's when you decide on the next increase. That becomes the rhythm: pick a dose, hold it for a month, then think about going up. Back to the R10 kit and its 100mg: follow that protocol and one kit should see you through about four months, maybe more if you respond well. Two R10 kits are certainly not money wasted — they could carry you past six months, which is plenty of time to watch your progress and settle into the routine.
