No, you don't want to plant now. The best thing would be to let some of the seed/fruit get a bit soft, then harvest it. To separate the seed you can put the fruit in a blender, cover with water, and blend just enough to separate the seed from the pulp. Let the seeds ferment, like you would do tomato seeds, then rinse, several times to get clean seeds.
Let them dry then store for the winter. About a month before your regular potato sowing date you can sow the seeds in a seedbed and they'll produce small tubers. If you have time in your zone to plant out those tubers, like you would do regular "seed potatoes" then do so. Each plant may be different from another so grow out what you like, discarding any that you don't, saving those tubers for normal vegetative propagation next year. Who knows, you may end up with a "Evan Gold" or "Evan Superduper", you get to name it!
HTH
Shoe
