I'm curious if the laser hair removal is really effective!

I'm suddenly really self-conscious about the hair on my arms and underarms.
I rush to get ready every morning before heading out, but the hair grows back after just a few days, and my skin feels rough for no reason, so I'm looking into laser hair removal. My friends say it's much more convenient once you start, but I'm curious about the actual effectiveness!

I'm not sure if laser hair removal stops hair growth entirely, or if it just makes it thinner and slows down the regrowth. As a college student, the cost is a burden, and I'd like to know how many sessions are needed to see noticeable results. In particular, since my skin tends to become slightly sensitive after hair removal, I'm also wondering if I should pay attention to pore care.

If anyone has tried laser hair removal, please let me know how the results were! I'm curious if my skin looked smoother after the procedure and if it felt like it helped with pore care. I'd also like to know if I need to do separate pore care due to the irritation from the treatment. I'm a little scared since it's my first time, but if it works well, I'd like to get a consultation!