Beginner need's guidance

[GM-Pandora]

You cannot make your current weapon fire permanently, you can get a sage endow like Loveless suggested, that lasts 20 minutes (or is it 30?).

Lave golem are probably too hard, so I suggest you ask on main for a forge smith to craft you a VVS Fire Fist, they are the easiest level 3 weapon to forge I think, so you shouldn't have too much problem finding someone to make/sell you one.