There are some great tutorials out there in Google-Land, but I hope
I can help a little.
When you discuss making an “x” (crossing two wires, soldering to
create four pieces that will be the prongs), you didn’t mention
whether you wanted to make a basket type setting (great tutorial for
So the question is what you’d be soldering the post to, unless
you’re intending to solder the post wire directly to the
cross/prongs? Here’s an image from a jeweler who seems to be making
something along the lines you’ve mentioned. This is a slightly
different kind of setting, but would be more secure than wires alone,
especially softened 20ga. The images are here, along with other
I hope I’ve been helpful to you, and good luck! I’m a beginner
myself, learning some of the very same things.