How many Rejuran sessions do I need to see results?

I am looking into getting Rejuran for the first time.
I became interested because my skin texture is rough and I tend to be very dry from within.
However, I'm curious if you can feel the difference even after receiving it just once.
Looking at the reviews, I've seen many people say that you need to get it done 2 to 3 times.
Conversely, there are also people who say their skin became moisturized after just one session.
The price is a bit steep to sign up for a package right from the start.
Usually, after how many sessions did you notice a change?
I'm curious if the skin texture or how well makeup adheres actually changes.
Would it be okay to try one session first and then decide on additional sessions?
Please share your experiences if you have received this!