Don't worry so much about hard to find ingredients... the actual success of each spell is more based on how much you believe...your true intentions, and your visualization and belief in yourself.
If you ever come across ingredients or tools you don't have, or can't find... rest easy. For example, you can use a butter knife...or even your pointer finger as an athame or wand... you can use a cardboard box as an altar... you can use any color candles you feel will work best, if you can't find the exact colors called for...
Same with the herbs...same with everything. Don't have incense? Use the smoke from a snuffed out candle.
Do you see what I mean? If you just let your heart guide you in all you do...all will work out...and in ways you never dreamed.