What should I check and ask when visiting the clinic for my first Botox injection?

The only dermatological procedure I've had was a whitening injection about 10 years ago. As I get older, people around me are starting to visit dermatologists one by one, saying that Botox is a must. Since the cost is reasonable, the procedure isn't difficult, and most importantly, the results are great, I now want to try Botox myself. Maypure is located near my home, and I've heard good reviews not only for Botox but also for other treatments, so I'm thinking of giving it a try. I'm curious about the essential questions I should ask during the consultation if I go! If anyone has had Botox at a Maypure branch near Bundang, please share your experience!