Good morning, @bethany9 
@anon87969570 has given you a wonderful answer, I think! The moon phases are generally seen as something like this:
I recommend taking the free Spellcasting 101 course here on Spells8. That might help answer some of your questions, too!
In my practice, the moon phases and other correspondences are extra bits of “ingredients” I can add to a spell. If I need to do a spell but the moon phase is “wrong” or something, I’m not going to wait for the moon phase to be “right”, I’m going to cast the spell.
I have a few things here that might help you!
Carnelian is said by some to help aid addiction recovering → Carnelian Crystal Activation: Energizing Guided Meditation – Spells8
Some people also say that many parts of the almond plant can help in rituals involving addiction → https://magickalspot.com/almond
@phoenix_dawn shared a tutorial for an addiction-breaking charm bag that you can try → Addiction breaking charm bag
As for staying mindful, that’s something that takes practice. You can start with a few minutes of meditation daily, really focusing on mindfulness rather than clearing your thoughts. Do this a few times a day, just focus on mindfulness while you’re doing something. For example, I can focus on the feeling of the keyboard beneath my fingers while I type. That’s part of being mindful!
I’d also look into sigils for strength, confidence, and willpower. These can all be created by you, and you can learn how to make sigils on Spells8.
As @anon87969570 said – don’t be afraid to ask questions, and I’m sure someone here will have an answer or be able to help in one way or another!