Enamel is optional. The Vintaj hammered circle is beautiful left alone! If you enamel the circle, enamel the un-hammered back of the piece. Please see this enamel project for how to enamel. Brass doesn't enamel as consistently as copper, so you might need to fire a second layer if the first layer doesn't produce the colors you want.
Cut 2 pieces of chain, each about 1.5".
To make wrapped loops for the small pendulum beads, cut a piece of wire about 3" long and center the bead on the wire. Bring the sides up and cross them at the top of the bead. Point one straight up, and the other 90 degrees to the side. Wrap this around the "straight up" wire about 3 times. Bring in snug with flat-nose pliers.
Use round-nose pliers to make a loop with the other end of the wire, run it through the end of the chain, and wrap the tail down around itself at least once. Trim excess and tuck in with flat nose pliers.
For the larger pendulum bead, follow the same general process, but cut a 3.5" piece of chain, and add a sunshine rondelle bead before making the loop. Remember to add dangle to bottom of hammered circle before closing the loop! When you wrap the top loop, it makes a cute little cap against the top of the rondelle bead.
To make the swirl on the bead at the top of the earrings, first make a simple loop with your round nose pliers. Attach the hammered circle and the top of the chain to this simple loop. Add the bead, then make a loop at the top, wrap it around itself once, then swirl it around the bead, and wrap the tail around the bottom loop 1-2x.
Attach ear wire to top. For best way to open and close loops, see Jump Ring Hint in Jewelry Basics 101 (PDF). You may also want to check out some alternate methods of making wire wrapped loops in this PDF instruction sheet.