If you dedicated you do not need to do it again. I am sure many people who have dedicated felt that something wasn't good enough and felt they may need to it over, including me. But you must not doubt it, Satan knows of your dedication and I am sure other daemons have noticed as well. This path takes a large amount of time, you will succeed and you will fail but there is always something you can learn from these experiences.
Don't beat yourself up either, you are so new and it is a wonderful thing! Become aware of your thoughts; notice when you think negative things about yourself, and try to correct these thoughts. Start small; incorporate meditation time into your day even small amounts of time helps say 15-30 minutes. Find out what times you prefer to meditate, what times you struggle (right before bed anyone?). Try doing the Reverse Torah Rituals or other rituals. This may feel awkward at first but you get used to it with time, and become more confident in your magic and your personal POWER :mrgreen:
I hope this helps you.