How many laser toning sessions do I usually need to brighten my complexion?

I am an office worker concerned about my dull and dark complexion. It seems like melasma and blemishes are gradually appearing, and my overall complexion has darkened significantly, so I am considering getting laser toning at a dermatology clinic.

I have heard a lot from people around me that while toning is gentle, you need to receive it consistently to see results. I am wondering how many sessions typically are required to see a brightening effect in my complexion—enough for me to notice a difference myself or for others to tell me my face looks better. Would I see changes after about 5 sessions, or do I need to receive at least 10 sessions consistently?

Also, given my work life, I would like to know how often I should visit the clinic for optimal results.

I would appreciate honest reviews and advice from those who have actually seen skin tone improvement through toning, including whether there are any side effects such as the skin becoming temporarily drier or redder after the procedure!