Welcome to the forum. Cansoft
has an applicator in the kit. You can apply the pessary with the help of the applicator.
It will be better for you to apply it with your hand (to avoid any injuries internally as you are pregnaant) and place it at a position as high as possible. Do it quickly. Do not fiddle with it.
Cansoft has cotrimazole which is used for fungal infections in the vagina. Yes, it dissolves and reduces the infection locally. Use it strictly as prescribed by your treating doctor.
Thanks for writing in the forum. Take care.