the first place i would recommend going is uke hunt (ukulelehunt.com).
a) they have such a phenomenal name that i would tell you to go there even if their site was shit.
b) they have tips on buying a ukulele and learning to play, as well as chords for everything from will smith to ingrid michaelson.
also, if there’s a music store by you, I’d go there instead of ordering one online because then you can play it before you buy it.