How many days does botox last to improve wrinkles on the forehead?

As I get older, I start to develop wrinkles on my nasolabial folds, which makes me reluctant to meet people. To solve these difficulties in social life, I am thinking about getting botox to improve my nasolabial folds. But

I have a question about how long botox lasts when I get it.

In addition, I know that there are incisional surgeries that adjust fat muscles or pull up the skin, and non-incisional surgeries that fill in the sunken areas with filters, botox, thread lifting, etc. for improving wrinkles on the arms.

I want to know which one has fewer side effects and is more effective.