Pick an inexpensive & widely used instrument

It will be far less expensive to find a guitar and materials to learn how to play a guitar, for example, than to find a hurdy-gurdy and the materials to learn how to play that hurdy-gurdy.
 
If you stick to instruments that aren’t overly complex and frequently show up in popular music, such as the guitar, bass guitar, keyboard, ukulele and harmonica, you’ll have an easier time finding an inexpensive example of that instrument and a wealth of free online resources from which to learn.
(Resource from the web)