String a crimp bead and clasp on your wire. One both are in place, back through your crimp bead.
Grab the crimp in the notch closest to the crimp tool's handle
Separate the wire and squeeze the crimp firmly
Move the crimp to the opening at the tool's tip and hold the crimp as shown. Squeeze the crimp, folding it in half at the indentation
Cheer and do a little dance (or however else you like to celebrate) because you've successfully crimped.