Need directions on how make rice on my oster rice cooker

Did it come with a manual? Use the lines (xx cup) and the cup come with it. Don't measure the water with your cup.

Here's a simple one page guide on how to cook rice in a rice cooker.

There are many types of rice. Follow specific directions for variety used.
2. Accurately measure rice and water then combine in rice bowl.
Pour specified amount of water in water reservoir. Cover and steam.
3. For softer rice, increase by 1 – 2 tablespoons the water mixed with rice
by the specified amount of water on the chart. For firmer rice decrease
water mixed with rice by the same amount.
4. Check doneness and consistency of rice at minimum time specified
for each type, stirring rice at the same time.
5. When checking/stirring rice, be careful not to drip the condensate into the
rice bowl which would reduce the quality and flavor of the steamed rice.
6. Use only clean water in water reservoir
7. Rice may be seasoned with salt, pepper or butter after steaming.
Combined In Rice Bowl Approx. Time
Type of Rice Rice Amount Water (Minutes)
Brown
Regular 1/2 cup 1 cup 42 – 45
Parboiled 1 cup 1-1/2 cups 45 – 50
Long Grain and Wild Rice Mix
Regular (6 oz. pkg.) Mix 1-1/2 cups 50 – 55
Quick Cooking (6-1/2 oz. pkg.) Mix 1-3/4 cups 18 – 20
Instant 1 cup 1-1/2 cups 15 – 18
White
Regular 1 cup 1-1/2 cups 45 – 50
Long Grain 1 cup 1-2/3 cups 50 – 55