Is nasolabial fold filler treatment effective? I'm curious about the things to consider.

I am considering filler injections because I get stressed every time I look in the mirror due to my nasolabial folds. I feel that just slightly filling in the wrinkles would make my appearance look much brighter, but now that I am actually about to do it, I am worried about potential side effects such as the filler bulging out, looking unnatural, or shifting. I would like to know how long the effects of filler injections last, and whether side effects like bruising or swelling tend to be severe immediately after the procedure.