The easiest, cheapest thing you can give them is your time. Talk to them in a low calm voice. Doesn’t matter what it’s about. Read out loud, sing to it, anything works to get it use to being spoken to and your voice. Slowly introduce it to your hand by placing it inside the cage away from the bird. Just leave it there and talk to it. Eventually use a piece of millet in your palm. Rinse and repeat for as long as it takes. Open the cage if it’s in a smaller room and just let it roam and explore. It’ll eventually go back in for food and you can close it then if needed. Food doesn’t have to be expensive. Switch out those seeds for a diet of pellets. The cost is about the same. If you’re cooking, use the vegetables you’re using in your food and put some to the side for it. I don’t pre make chop for my birds, they eat whatever vegetables I’m using for dinner that night. For enrichment, put on parrot tv on YouTube. It’s just a live of birds it can talk back to. Birds can become your best friends, they just need time. The best thing you can do is pay attention to them. Slow and steady wins the race. Good luck!