How long should I wait for the effects after one Rejuran treatment before deciding to get another?

I'm looking into getting Rejuran for the first time, but I'm already wondering how many sessions I need.
Looking at the reviews, some people say their skin became moisturized after just one session, while many others say they need to receive it multiple times.
My biggest concern is my skin texture, fine lines, and a slight loss of overall elasticity.
I'm wondering if it's common to plan for about three sessions from the start.
Alternatively, would it be okay to try one session first to check my skin reaction and then add more?
In particular, I would like to know how long I need to wait after the first session to properly assess the effects.
I'm even more confused because I heard that feeling my skin has improved in just a few days could be a temporary change.
I am also wondering if it is appropriate to check for changes in skin texture or elasticity after about 2 to 4 weeks.
For those who decided on additional treatments after receiving one session, how long did you actually wait before getting the next one?
If anyone who has just started has any experiences, I would appreciate it if you could share the number of sessions and the intervals between them.