The first step is watching this youtube video:
DIY Knife Logo Metal Etching How To project The next step is to find a circular and flat (metal or copper) object that you wish to use.
I'm pretty sure you can find one somewhere in your house, Or by opening up junk devices in your backyard like old radios, e.t.c. - In hopes to find the perfect circular flat (metal or copper) object that you need for this project.
It doesn't have to be a circle...
It can be a cross,
Or w/e. ~
It just has to be faceless,
Empty,
A canvas.
Then get a piece of paper and draw your symbol(s) onto it,
And or sigil(s).
Make sure they are big enough to cut out with a box cutter or something similar.
Once you have your design ready,
Utilize the method in the video above to engrave it into your chosen object.
Once you're done making your talisman,Tip: If you do not have that monstrous jump starter like the guy in the video has - you can use an ac/dc adapter that is 12 or 20 volts, Just cut the end off of the ac/dc adapter and bare the wires to a length you desire, then plug it into the wall after you have everything setup for the etching process.
Color it in with whatever color you want,
And then charge it or imbue it with the energies you desire.
...
If you want to turn it into a necklace,
You'll have to find a way to drill a tiny hole into it if it is thicker than half a centimeter, else it will be easy to drill a hole into it if it is thin enough.