True about wire being safer with beads that may have sharp edges. I like 49 ply Beadalon-- it's both strong and flexible. If that is overkill for the size of your beads/pearls, they sell beading wire that has a smaller gauge and fewer ply. The thinnest I've used is called Soft Touch.
To connect the wire to the clasp, I like to use
screw type crimps. There is a tiny screw along the side of the crimp. You loosen it, pass the wire through the main hole of the crimp same as through any other bead, then through the clasp, then double back through the crimp. Then you tighten the side screw with the tiny screwdriver they sell (it's the size of an eyeglass frame repair screwdriver) to secure the 2 wires. For extra security you can add a drop of Hypo Cement (glue) before tightening the screw. These crimps also come in several colors.
Sources:
• Screw-Tite Crimp beads:
https://www.firemountaingems.com/search?searchtype=Shop&keywords=screw+crimp+beads
• Scrimps (made by Beadalon): on Amazon:
https://www.amazon.com/s?k=scrimps+crimp+beads&crid=176R2LXTHWB0G&sprefix=scrimps+crimp+beads,aps,82&ref=nb_sb_noss