Help fill holes in Trunk lid

So in my 66 dart, it had the wrong trunk trim, which was too heavy and caused trunk to not fully open. I finally found the original Trim and installed it (the original holes were still there.) But now I have 6 big (1.4in) holes to fill and paint. What is my best bet for this fix? I have never done any body work. Also I notice there is a fair amount of bondo filler at the top of the trunk lid. I plan on removing the lid and repainting the entire thing BLACK.
I guess the prev owner didnt remove the trim when he repainted the car. thus the red. and yes the light bodies are painted black. View attachment 1715126631
There's a couple options... first, bondo(don't recommend this one), second, a copper spoon if you can get behind it and simply fill it with a weld pool, third, make little circle patch panels and weld them up.