I took advantage of my retirement by starting to make small bells.
The meaning for this word comes from the kanji. It's a small bell!
Since this word is made up of a single kanji, it probably uses the kun'yomi reading. You did not learn this reading, so here's a mnemonic to help you:
Someone is ringing a small bell, over and over. It's Ichiro Suzuki (すず) being obnoxious, ringing that small bell. I think he's trying to get practice started.