Strawberry blonde is very light red. So if you don't have natural red tones, you'd probably be safe with the medium blonde. Also, if you're not sure, it might be worth it just to get a pack of each.
As for attaching it, you can either get the drawstring kind, or make a weft on your own using a thin line of glue. Or, you can just tie them in loose with a small hairtie, then cover the base with the bows.
"Katie Bair's Art Emporium and Petting Zoo" - Custom Cosplay Wig Designs!