Age 54 female
In my opinion, the best resurfacing laser would be a CO2 laser. Your glabellar line looks fairly deep on your photo though, so I'm not sure if laser resurfacing would give you the best result. It is possible that a filler could help.
I would use the Sciton TRL laser.Its an Erbium laser that allows very precise removal of skin without the pigmentary complcations often seen with co2 lasers