For example, instead of saying "play [certain musical instrument] casually", is there a verb that can be used in place of of the word "play"? In my mind, "casually" means playing the instrument in an informal way - it may not be the correct way to do it; the person does not intend to learn how to properly play it; the person is only doing for their own enjoyment.
Somewhere in my memory I have the phrase "fiddle around" that somewhat resembles the meaning I want to express, but I'm not sure if it is accurate enough., which means
Fiddle around: to spend time in activity that does not have a real purpose
Some other words I know that have similar meaning but they don't seem to be appropriate to be used with musical instruments:
Doodle: an aimless or casual scribble, design, or sketch
Tinker: to repair, adjust, or work with something in an unskilled or experimental manner
Is there a better word/phrase to use?