Sorry what exactly are you asking? IMO go take a pottery class to learn the basics . I have no idea what you really want with no real understanding of what you are planning. You begin by making a form of whaever and that requires clay, usually a wheel and a place to fire the original pices before any glazes or slips are used . Take a class it is the right way to learn

Wrong forum to ask. You need a ceramics forum.

I knownits a bit late to answer but for anyone who comes across this I highly recommend John Britt's videos and books. He explains the process for making your own glaze in terms that are easy to understand.