is ther anything that i have to do to weld on my car like unplugging my ecu? or my battery or radio??

 

I would leave the battery in place, but disconnect stereo/ECU/anything computerized.

Also get some thick material to tape over any glass. Welding spray likes to blast everywhere, and its hot enough to melt and stick into glass when it hits.

 

In my old shop, we always unplugged both terminals of the battery.