Dianne,
Understanding that you now have dentures, whether there were other options or not, you now have to move forward with them. There is really no reason why a good, functional and comfortably fitting denture should prevent you from eating a steak, apple or corn on the cob. You just have to adapt to the way they work.
If, after much perserverance, you find yourself unable to accomplish eating and enjoying these foods you should probably consult the dentist who constructed them to see if they can be adjusted to accomodate the situation. If the answer is they cannot then you may want to consider having implants placed to support and anchor the dentures in your mouth so that they do not move or slip when you eat. Your existing dentures can easily be secured to implants without having new ones constructed.
After all, eating is one of the simple pleasures of life and being a denture wearer should not deprive you of this. You just have to know what options are available.
All the best.
Mike