Whats the age someone can get a food handlers license in Texas?

me and my friend wanted to open our own online bakery! people tell us all the time that we need to sell our products, and why not now? it seems unrealistic that a 15 year old girl (16 in 2 months) and a 15 year old boy can open up a shop and blossom, but why not? does anyone have any advice for us? and do you know the age we can get a food handlers license in Texas?