HELP!

Welcome!  Just give it a little more time. When I first brought Ralph home, he would only step up onto a spare perch, just like Pistachio. It took a little less than two weeks before Ralph was ready to climb onto my hand. Now, 9 years later, if I open the cage door, Ralph hops onto my hand right away, whether or not I'm inviting him out (fortunately, he also knows how to step down ). So just let Pistachio set his own pace, and before long, he'll be stepping onto your hand.

Training usually goes better outside the cage. Parrots think of their cages as their personal space and often object to anything intruding into it, though, of course, sometimes it is necessary. Advanced training usually works better away from the cage entirely, but that has to wait until the parrot is ready to venture farther from the cage.
It's typical of a new parrot not to eat much during the first few days in the new home. It's a good idea to continue feeding what the parrot is used to, as you've been doing with Pistachio, and gradually introduce new foods. With unfamiliar foods, it can help to eat the same thing and act like it's the most delicious food you've ever tasted (you don't have to do that with the seed mix or pellets ). Parrots usually will want to try foods their human companions are obviously enjoying. You can offer a variety of vegetables, and most can be served either raw or cooked (most beans need to be cooked). You can offer them prepared in different ways; some birds will prefer larger pieces, some will like things finely chopped (as my QP Ralph does) or mashed up. When you're introducing new foods, you need to be prepared to waste a lot of food. It can take lots of time to get a parrot to even try something new, and longer for them to decide they like it. It took eight months to get Ralph to try broccoli, but he likes it now and gets it now and then. Ralph's absolute favorite food is fresh green peas; if you can get some, try them with Pistachio. No guarantees-- my other parrot Scooter the CAG likes to chew up pea pods, but won't eat the peas. Cooked pasta, cooked grains like quinoa and barley, and fruits are good foods to try too (though neither of my parrots like fruit all that much). Just be patient and persistent, and eventually you'll find things that Pistachio likes to eat.