Hi Cherry, and welcome to UU!
That is good advice above. The Makala dolphin ukulele plays pretty well, and is fun. I am a regular size guy (5'10") and a soprano is not hard for me to play, in fact it really has become my favorite size uke to play.
As far as which uke to get, I say buy the best quality uke you can afford. You won't be sorry. Excellent advice to check out MGM and UkeRepublic. Both owners are regular posters here on UU and will make sure you don't end up with a garbage uke.
Looks like there are some sales at ukerepublic. For a few more dollars you could get a mango soprano mainland ukulele. A great uke. However, there is a lot in your price range so you could get something nicer than a dolphin.
MusicGuyMike's ebay store:
Talk to/email both of them and see what they suggest. Also, get a electronic clip on tuner, and you have everything you need. Good luck and let us know what you get!
Vintage Ukulele Player and Collector