What is the Botox treatment cycle?

Every time I look in the mirror, I'm more self-conscious about the wrinkles on my forehead and between my eyebrows than before, so I'm considering getting Botox. Since it's my first time, I have so many questions. I feel less pressure because it's a procedure many people around me get, but I am worried about how long the effects last and whether I might develop a tolerance if I get it too often. When I search online, I find that the duration of the effects varies from person to person, which makes me even more confused. Some people say it lasts about 3 to 4 months, while others say it lasts much longer, so I'm curious to hear actual experiences. I would like to see fine lines reduced while maintaining a natural facial expression. I also want to know if it is better to start with a lower dosage for first-timers. I'm curious if I can return to my daily life immediately after the procedure. Please let me know if bruising or swelling tends to last a long time, and how many days I should avoid exercise or saunas. If there are any aftercare tips to help maintain the effects for a long time, please share them as well. Since it's my first time, I have many questions, so I would love to hear honest reviews and advice from those who have experience.