Few people teach because of law and it's also hard to teach a subject you feel through messages.
Try picking up a copy of Scott Cunningham's Incense Oils and Brews, that could help you with your potions. I also like Magick Potions by Gerinda Dunwich.
Potions are basically liquid spells, so try looking some herbalism too. Hot honey and lemon could be considered a healing potion if you make it mindfully and add energy to it. Adding sea salt and lavender to a bath could be considered a potion as well. Kitchen Witchcraft might also be useful since you could also make a soup using certain ingredients, energy, and yet another potion.