Everyone has some great advice, and I hope your new moon time was very healing for you, @Susurrus! 
Remember it is absolutely normal to feel scattered and tired after spellwork. Doing magick takes a lot of focus and energy- it is important to be aware of this and make some time for self-care and recovery afterwards 
@janelle shared her experience with post spellwork exhaustion in this post: Energies After Doing a Spell - and there are many suggestions on how to recover from spellwork aftermath!
There is also a very thorough discussion about the energy involved in spellcasting and a host of ways to treat and recover from spell-burnout in @MeganB’s guide: Feeling Tired After Spellcasting? Here’s why- and How to Help!
All in all it’s absolutely a normal and natural feeling- I hope you can find some good advice on ways to recover and feel good so you can continue practicing and learning again soon! 
Blessed Be! 