Before you buy a new instrument, consider the following things:

1. Think carefully what size ukulele you would like to have. It depends on your playing skills and of course your preferences.
2. After consideration, choose the ukulele that suits you best in size, specifications and appearance.
3. You must first tune the instrument, see the instructions here.
4. You can find many fun tips and tutorials here.
5. Practice and practice!
6. Record yourself. This will be a great help as you can easily improve your gameplay.
7. Invite your friends to play ukulele as well. In addition to being fun, you can also learn new techniques in a diverse society.