Donk Around

1) To engage in an activity casually or in a nonserious manner.

2) To be content pursuing a skill or hobby as a novice or without a great deal of committment.

"Are you any good at tennis?"
"Not really; I just go out there and donk around."

"My old jetski is no good for tricks, but it's fun to just donk around on."

"I don't really need a faster computer. I just donk around on it."