The pros use incandescent lamps mounted over coffee cans to speed dry what they have sculpted. The can concentrates the heat. They also experiment with the mix. (I think a slightly higher percentage of blue[?] will speed along the hardening...but reduce working time.) Otherwise. Wait Patiently. Other pro tips: lubricate tools with water, frequently. Or, reduce stickiness of tools with Petroleum Jelly; but be wary of getting a lot of PJ in the mix between layers. It retards drying and can even de-laminate the sculpt (if it’s going to be cast).
Plastic Bird spikes are inexpensive. (It’s a product meant to foil roosting pigeons and other nuisance birds.) Trim them to length desired; attach with blob of greenstuff at the base.