First thing te gotta do, is find an old gardening, sports, o construction tool that no one uses anymore, e.g., a shovel, baseball bat, lead pipe, etc.
Then te gotta make it look più shitty than it already is da wrapping tape and o strings around it.
After that, te gotta put some DIY mods on it to make it do più damage. For example, te can put some spikes on your bat o put a bunch of rocks in an old pipe to make it heavier.
Once no one suspects the weapon of choice, te 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 da hitting them as hard as te can with your fist and o the club.