If you're looking for online pottery supplies and resources, it can feel a little overwhelming. Here is a list of pottery supply stores that I have use and liked.
I've also created a list of my favorite pottery books for you to check out.
Also, use these two links to read about my two favorite pottery wheel brands. Shimpo pottery wheels and Brent pottery wheels.
Krueger Pottery Supply - Clay Supplies, Pottery Classes, Kiln Repair (This is where I bought my Shimpo Aspire Portable Wheel)
This are the good big ones if you just need something and don't have time to dig around on the internet.
That being said, I recommend shopping locally, or as locally as possible, as much as you can. There are lots of smaller regional ceramic supply stores that are wonderful. If you can make a trip into the store, you'll learn a lot just from wandering around and talking to people.
250 Tips, Techniques, and Trade Secrets for Potters
The Complete Potter
Simon Leach's Pottery Handbook
The Potter's Bible
If you own just these 4 books, you will have a wealth of knowledge about pottery at your fingertips at any moment!
Thanks for checking out these recommendations and, as always, Happy Potting.