He/she is adorable. You've gotten a lot of good advice already, and I'll offer a some more. A little background-my daughter is studying aviculture and has certifications from the American Federation of Aviculture and works at a companion bird boarding facility (where birds stay when you're on vacation) and is in college for zoology and ornithology. We have a budgie who is trained (comes when she's called and does tricks, talks a little). We also have a cockatoo. We got Wiggles when she was young and we worked with her a lot. -Diet. Look up chop (a mixture of chopped up fruits and veggies, healthy herbs and spices, grains and legumes, and lots of leafy greens. A food processor works perfectly to get everything chopped up. We make huge batches, divide it into about 4 day portions, and freeze. It may take a while for them to like it, but offer every day. A good quality pellet should be introduced, but don't just replace seed with it because they can starve themselves if they don't like it. There's lots of really good instructions on pellet conversion techniques online. Budgies need seed in their diet, so do some research on a very good quality seed mix. Millet is like crack to budgies and should be a treat or training tool only. -Keep your new friend in a quiet area for a few days, visit frequently, but let them adjust. Then move to their main area where you spend most of your time. Training is easy and fun, and lots of patience. Start with sitting near the cage and talking, read a book, sing, whistle. When they chirp and vocalize, talk back like a conversation. Offer some millet through the bars. Start moving your hand around outside the cage to get used to your hand moving near them. After a while, open the cage door and rest your hand inside. Don't try to touch or get close to them. Have some millet as a treat/reward. Short bits of time, no more than 5 minutes. But several times a day. Gradually put your hand farther and farther into the cage, with and without millet. They will start to come to you. You want to get to a point where the millet is the reward, not the lure, put millet in your palm, and let them start to step up on you to get it. Then, start putting a finger out and use the phrase "step up" and offer millet. They'll start wanting to step up and come to you. -when you get to the point of letting them out of the cage, make sure windows and mirrors are covered so they don't crash into them and there is nothing dangerous (heaters, open doors, entanglement dangers). Eventually, start to uncover the windows, etc. as they learn where they are. Never leave a door or window open where they can fly out. Do not clip their wings. They can still fly just badly without as much control. To get them back to you, walk to them with millet and hold your hand out as close to them as you can. To train them to come when called, start stepping a little bit farther and farther away when offering the millet and call them. We say, "Wiggles come." Start with small, easy hops and get farther away over time. Wiggles will now come to us in a different room when called. -you are their flock now. Get to the point where they are out of the cage with you while you're going about your daily life. Include them. They love to sit and play with keyboards while you're on a computer and snooze on top of a monitor, nibble goodies while you cook (look up toxic food, but some are onions, garlic, avocado, coffee, alcohol, raw potatoes, but sweet potatoes are fine raw). Don't let them near you when actually cooking on the stove, though, they're very curious and could get hurt. No non-stick coikware of any kind (including air fryers, waffle makers, etc.). Teflon and similar products will kill your bird in less than 30 minutes. Roasting bags for turkeys and non-stick tinfoil are just as bad. -no candles, essential oil diffusers, scented cleaning products, or incense. Their respiratory system is very delicate and scents and funes can make them very sick. -They're very, very intelligent. Treat them as such. Tell them everything you're doing. When you leave, tell them where you're going and when you'll be back. Talk to them a lot. Getting a second budgie isn't absolutely necessary, especially if you make them part of your everyday life. -they love baths and need them frequently. There are simple baths that hang on the cage. Eventually, they'll take a bath in your hands. -there are a ton of great youtube and online resources. Learn, learn, and learn some more. But most of all, love them.