So parrots (all of the birds you mentioned are small parrots) can actually be more complicated to care for than people expect
They cannot just eat seed. They require a balanced diet with vegetables, sprouted seeds and legumes, a little fruit, flowrrs and herbs, microgreens and a small amount of seed mix (pellets are also a good addition to their diet - if you don't feed these then unless you can provide a really good variety of fresh foods you should add in Avimix vitamins to their fresh food)
They also need to be free flying around the house for as much of the day as possible, the cage is their bed ir safe space the same way a crate would be for a dog
They need lots of toys, foraging opportunities and mental stimulation. They also bite when they don't want to do anything you want them to do
Your house needs to be free from toxins. This means your non stick pans need to go (your air fryer and baking tins also usually have telling coatings so will need to go), no plug in fragrances, no fragranced sprays or diffusers, no candles. Your cleaning solutions also need to be avian safe - we now clean the whole house with just f10 (i have budgies, Australian King Parrots and conures)
All of the above can kill a bird quickly or cause severe respiratory distress
Birds pluck their own feathers when they are stressed, caged too long or don't have enough to keep them busy
The birds always do best in pairs
Avian vets are few and far between and expensive - you need to get insurance for them through exotics direct