Yes, you can make a batch and portion it out and freeze it, that is what I do. Just pull out the next mornings ration and let it thaw overnight and it is ready to serve in the morning.
Presently your bird has several things going on all at once, and this is causing some behaviors that appear to be contradictory but in actuality are not, they are the direct result of the things going on with the birds life right now.
We can consider that Luna has been pretty much left alone and either in or on top of her cage, that you are now starting to take a more active role in her life, that she is likely hormonal due to the diet and human light schedule. These all cause her to react to you in the manner that she does,
I am sure that she is glad for the new attention and is excited to see you and she wants to interact with you, but having spent so much time in and on her cage she is cage bound and afraid to leave the cage.
The things to do are to spend several hours a day talking to her, getting her used to your presence and accustomed to the sound of your voice reassuring her that it is alright. Make the suggested changes to her light schedule and diet and read and start using the target training link that I provided you with, two 10 to 15 minute session per day of that. Work on stepping up maybe asking her to step up once or twice whenever you pass by he cage three or four times a day until she is doing it fairly reliably. Keep all training sessions short and for now interaction with her may work best in shot doses but often, four or more times a day.