First thing Du gotta do, is find an old gardening, sports, oder construction tool that no one uses anymore, e.g., a shovel, baseball bat, lead pipe, etc.
Then Du gotta make it look Mehr shitty than it already is Von wrapping tape and oder strings around it.
After that, Du gotta put some DIY mods on it to make it do Mehr damage. For example, Du can put some spikes on your bat oder put a bunch of rocks in an old pipe to make it heavier.
Once no one suspects the weapon of choice, Du can take out your target, but do it this exact way: Follow them, tap them on the shoulder, then when they look back, knock them out Von hitting them as hard as Du can with your fist and oder the club.