Need help in Animal Crossing New Leaf

I went to sleep right after I started playing it and I couldn't get a watering can from Isabelle. Nook's shop doesn't have it in stock either right now, and I don't want to wait till tomorrow, because I have to water a few flowers and get my approval rating up. Is there any other way I can get a watering can?

Have you done some errands for Isabelle? I'm pretty sure she gives you one after you complete a few tasks from her in the "Advice for living here" option. If she doesn't give you the watering can after several tasks, I guess your only options are waiting for it to be available in Nooklings, buying it from a friend's town, or change the 3DS time and date (if you're impatient).

Hopefully you can fish out enough trash to sell to boost that approval rating as you wait for the watering can.

Nooklings doesn't have a watering can if you can't do those tasks for Isabelle you have to wait until the Gardening Shop run by Leif gets built.

If you keep asking her about what you have to do, she will eventually give you a task that requires a watering can and will give you one.