you can actually google that and there are videos that teach you that!
I had to google it when I first got my yorkie also but she was actually nameless for a week before we finally decided on a name.
we tried out different names with her first and when we called her Ellie she seemed to perk up lol. It shouldn't take too long I think and you can probably accomplish it in 10 minutes but what I learned from the videos was that your actually suppose to sit down with her and call her name. When you call her name and she makes eye contact with you, praise and give her a treat. She'll get it really fast
make sure you use a treat that she realllly enjoys, that always helps! Our German Shepherd can be unruly when he wants but if we pull out a treat that he reallly likes, he'll do anything we ask.