I'm curious about the duration of the filler's effects, etc.!

I keep finding myself drawn to my nasolabial folds and sunken cheeks, so I am seriously considering filler injections. Surgery scares me too much, and the recovery period is a burden, so I am looking into fillers as a simple procedure. Honestly, given the cost involved, I am worried about how long the effects will last and whether I can truly look naturally beautiful.

I have a few questions,

First, I am curious if there is a significant difference in the duration of the effect or longevity depending on the type of filler (domestic vs. imported).

Secondly, I would like to know about lifestyle habits to be careful of after the filler procedure, or if you have any personal tips to help the effects last a little longer.

Lastly, I saw reviews stating that fillers can spread sideways or slide down over time. What should I be most careful about to prevent these side effects?

I would appreciate your advice!