Best option for deep smile lines (nasiolobal folds)? Age 24. (Photo)

I have these lines at either side of my mouth. I think it may be from repetitive face movements (of smiling big) as I try to look after my skin as best I can in every other way. I'm 24 and researching best ways for a solution to reduce these lines. I'm thinking dermal fillers? My question is if you would recommend getting fillers at this age and if there is any negative side effects? Or what other solution may help. Thank you.