I've attached some ukulele chord charts that are freely available on the internet for an individual's personal use. You can print them out as a handy reference! There's lots of freebies on the internet!

Tune your uke:

https://ukebuddy.com/ukulele-tuner

http://ukulelego.com/articles/tune-ukulele/

How to read chord charts:

http://ukulelehunt.com/2008/03/19/how-to-read-ukulele-chord-charts/

https://ukuguides.com/how-to/how-to-read-ukulele-chord-diagrams/

https://www.youtube.com/watch?v=eGh7E8dJw8Y 

Strumming patterns and techniques:

http://www.bytownukulele.ca/Portals/UkuleleClub/Songs/1_Ukulele%20Strum%20Patterns.pdf

http://ukulelego.com/tips/ukulele-strumming-patterns-for-beginners/