Q: Do you have a potion guide for ESO?

I would refer you to my Alchemy guide. It has plenty of details about this professions, including how to make potions, an a list of ingredients and their effects (traits).

Most useful potions that majority of players will be using and buying are listed there.

• Bugloss and Columbine for health + magicka restore, or also add Mountain Flower for health, magicka and stamina restore.
• Lady’s Smock and Cornflower for restoring magicka and increasing spell power.
• Dragonthorn, Blessed Thistle and Water Hyacinth can create a potion with weapon critical and weapon power.

Again, I’d recommend going over my guide for alchemy linked above and checking it to learn some basics, it should help you understand the profession better. If you have any other questions feel free to ask in the comments!