It is better to start now than to wait to buy equipment.
You can work around not having a ball, barbell or ab wheel for the following exercises:
*Stability Ball Roll Out/Up
*Barbell Roll Out/Up
Instead you can perform the following alternative exercises until you purchase the equipment you need:
* Planks - CLICK HERE.
*Mountain Climbers - CLICK HERE.
*Or you can do roll out or roll ups with a towel on a hard surface. For a demo video, CLICK HERE. :)
**Be aware that the floor can be slick, especially if this is your first try at this, so be sure to have a wall to stop the slide at the end of the motion or just remove your hand from the towel and catch yourself if you feel yourself beginning to lose control. :)