Once you've learned how to forage for yourself, the next step you should take is to learn how to work with clay. You will need a shovel to perform this task, and you start off with one, so don't drop it!
'''Note:''' ''There are clay tiles just west east of NewTown.''
Once you have found a tile of clay, double-click a shovel in your inventory (you can open this with the F3 key) to activate it, and right click the clay tile. You should see a new option named Dig; click it. If you've started to dig, you're on the right path, but if it states that you're on too steep a slope to dig, simply move to another position and retry. Slopes become to steep when the dirt slope is greater than 3x your digging skill (This includes any slopes on any tiles bordering the tile you wish to dig on).