Should I adjust the type of laser hair removal equipment or the recommended number of sessions?

I had made plans to go to the swimming pool with my friends, but while showering, I suddenly looked at the condition of my underarms and legs and realized my mistake. Since I had been shaving them off with a razor at home every time, my skin had become rough and it seemed like some discoloration was even appearing, so it upset me every time I looked at it.

I think starting laser hair removal is the right answer. I heard that it stimulates the hair roots themselves, making the hair thinner and cleaner over time, so the more I heard about it, the more convinced I became. I figured it was a hundred times better to get laser hair removal and manage it properly from the root rather than getting stressed out by wrestling with tweezers or a razor every time I shower.

Since it's my first time, I want to know if I need to adjust the type of laser hair removal device or the number of sessions based on hair volume, and I'd like to hear some tips or experiences from those who have successfully removed their hair.