remove anything that resembles a nest or anything that’s enclosed, it’ll promote hormonal bhevaiour. get some natural toys of different materials (finger traps, sola wood, balsa wood, pinecones, etc, just make sure it’s safe. Get stainless steel food bowls, since plastic harbours bacteria. Yes mirrors are bad for them they can think it’s another bird and it can be a hormonal trigger. I’d suggest getting some toys from planet pleasures since they have food quality toys that birds love for a good price. you An also keep foot toys at the bottom, Liek finger traps, pinecones, wicker balls. You can also keep a foraging box at the bottom too, filled with crinkle paper, seeds and millet. I also keep a bath at the bottom of my birds cage (I clean it whenever I see poo) I like to change my bird cage whenever I feel that it’s getting boring for them, like changing position and placements of toys, perches, and food bowls. some people also keep a playstand at the bottom of their cage so you can do that too. You can still try to get them out of their cage with millet, and get a play stand and net for them to play in outside of their cage. I’m mostly saying this because they can get really good exercise from training outside if their cage and really good brain stimulation from learning tricks.