If you do not have a Resort Reservation booked, you may book Dining Reservations up to 180 days before date of dining. So, no, you will not qualify for the 180+10 available to confirmed resort reservations.
You can either book the meals each day, or you can book a temporary room only reservation which will allow you to use 180+10. Once packages are released, you can then swap to the proper package without affecting your dining reservations.