There are many good ukulele tutors on YouTube
These are just a few of the ones we would recommend to get you started:
Ukulele Saz
'Ukulele Saz', known to us as Sarah, has many very good video tutorials on all aspects of ukulele playing.
Check ot her YouTube Channel:
Phil Doleman | Complete Beginners Ukulele
Cynthia Lin | Ukulele 101
The Ukulele Teacher | Your First Ukulele Lesson
Cory Teaches Music | 10 BEST Beginner Ukulele Songs
One Music School | Ukulele 101