If the HF start messes with your electronics, I’d try shielding them in a case first. If that doesn’t work, you can put a wire from the exposed copper part of the torch to the ground on the machine, it should solve your HF issues. The downside is that you will most likely get faster wear on your consumables Link Here. But hey, you can buy them in bulk on Ebay for next to nothing.
You won’t need belt covers. Put your work piece as far down as possible to keep it away from the middle assembly if you are worried about heat, but it shouldn’t be a problem.
An all metal table would be ideal. If you have a wood table, just keep a fire extinguisher handy and use as much common sense as you can spare.
Start cutting on thin stuff and work your way up to thicker materials so that you minimize blowback spatter while you are figuring out amperage settings, feed rate, and torch height.
You could always build a water table underneath if you get adventurous.
But seriously, fire extinguisher.