How long does nasolabial fold filler last?

My nasolabial folds have deepened, making my mouth look more protruding and giving me an overall gloomy impression, so I am looking into nasolabial fillers. However, since this area involves frequent mouth movement, I am hesitant because I have heard many stories about the fillers deflating or disappearing quickly. How long do nasolabial fillers typically last? Also, since this is my first time, my biggest concerns are the severity of the pain during the procedure and how long the downtime—such as bruising or swelling—will last. Is it usually possible to resume daily activities immediately after getting the fillers? I am also curious if there is a significant difference between domestic and imported products. Please advise on which type and dosage I should choose for my first nasolabial filler treatment to ensure long-lasting results without failure!