When I first started playing the ukulele I could not keep the darn thing in place while I changed chords.
I watched vids, read online discussions, read books.
None of the advice helped and so I went the strap route. I have two ukes and each has a full-size strap (I'll talk about the elephant later).
As I struggled and researched, I learned a few things.
One is that a full strap needs some installation skills unless your instrument already has the hardware.
Another is that many ukers prefer the Uke Leash®, an innovative half-strap. http://ukeleash.com/
And I also learned that there are some who (jokingly) look down on those who need the support. It's so light and small, they say. How come you can't hold that little thing still, they ask. Why am I so much better than you, they imply. But they always use a cute emoticon so I know they aren't really that horrible.
So what's your story?