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You’ve come to the right place, because I have a lot of experience buying ukuleles.
It’s a small four-stringed Hawaiian instrument in the lute family. It often has nylon or gut strings, and is tuned a lot like a guitar.
For more info: Wikipedia.
In the long view, they’re from Hawaii by way of Portuguese immigrants in the 19th century. In the longer(?) view, they tend to come from trees.
In our case, they often come from Guitar Center.
There are four sizes of ukulele, though really it’s more like 3½ sizes.
tuned GCEA, with high-G
what you picture when someone says “ukulele”
a Soprano with a longer neck & a few more frets
ideal if a soprano use feels too small
tuned GCEA, sometimes low-G
larger overall, easier fretting for large hands
tuned DGBE, it’s almost a guitar!
the same chord shapes work but it’s a different key
Here’s the secret: No.
The strings are usually soft nylon, and the neck is small & easy for most hands to get around. Most of the time you don’t even need to strum with a pick, you can just use your fingernails.
And here’s the kicker: If you know how to play guitar, you probably can already play the ukulele!
Think of it this way:
Imagine a normal guitar.
Remove the two lowest strings.
Put a capo 5 steps up.
Ta-da! That’s a ukulele.
The note relationships between the tuned ukulele strings are the same as a guitar’s 4 higher strings, so the chord shapes are the same also.
It’s mad easy, yo!
Rightly so. Ukuleles are venomous when they reach maturity.
Just kidding, you’ll be fine.