If it has a screw-on freewheel on a normal 1.37×24 thread, you can try suicide. I like the wide-base Trialtech sprockets for suicide hubs, but track sprockets work fine too.
The way that's safer than brakeless is to have brakes. Preferably one on each wheel, even if you have a proper fixed hub, but definitely two brakes with a suicide hub.
If it has a screw-on freewheel on a normal 1.37×24 thread, you can try suicide. I like the wide-base Trialtech sprockets for suicide hubs, but track sprockets work fine too.