I had her since 4 weeks old and had hand fed her.
Sometimes she beak grind but it's not her favorite hobby.
Yes she have wood cubes hanging made from real trees and a ladder also I let it out of the cage lot of the time when I can.
Her main diet is canary mix, sunflower and some pellets. Mostly she eats sunflower.
1. The first thing I would do is take her in and get her beak trimmed.
2. While you do that, change her diet... Sunflower seed are okay for training.... otherwise I would omit them from her diet to only a few (2-3) a day. She needs a variety of fresh (or frozen) organic veggies.. and some fruit (daily) There are so many food options out there, GoldenFeast ( I plug them all the time, they are my favorite) has some wonderful varieties of mixes that I know your P'let would just love... the Australian blend being one of them. Another good food is Volkman's Featherglow 15 soak and serve.... I make a little up for kiwi everyday. She loves it. Chia seeds are great to add to veggies. Sprinkle some on some fresh broccoli and see what happens.
3. Pellets are good, depending on what kind you are feeding her. I prefer a human grade like Goldenfeast or Harrisons. But pellets should not be the main course. They can be hard on a P'lets kidneys.
4. Natural branches are great for chewing, but you have to know where they are coming from. If you know that they are safe, then go for it.
5. She may not be grinding her beak because she needs it trimmed. They grind there beaks when they are content and especially at night before going to sleep to get it ready for the next days, eating and playing excursion.
6. Try and get her out of her cage as much as possible during the day. Have parrot safe areas she is allowed to hang out on. If you need ideas let me know.
I hope this helps... good luck, let us know how it goes.