Buying a saw doesn’t make you a carpenter.
Please, get some training on how to safely use your new heater.
‘Cause buying a gun doesn’t buy the knowledge nor skill to use it effectively nor safely.
(likely there is a gun club nearby that can help, or you can go to the NRA website to find some training classes)
But please, learn to use that new tool you bought. They are, like a table saw, unforgiving to folks who don’t know how to use them safely…and the person you hurt might not be you.