Look in the index and, if the information needed to give you more clarity is not in that book, put it down and do research in another book. Reading and experimenting is the best way to become a great cook. Many times, mistakes are very delicious. Keeping your house well stocked with dry, canned and bottled goods will enable you to cook more often. It's not all or nothing.
Fresh foods can work hand and hand with canned foods to create wonderful nourishing meals.
Cooking well is not about being perfect. It's about cooking is happily, lovingly and consistently.