Hi there and
to the forums!
Your first priority is ensuring your budgies are in good health
Scaley mites need to be treated right away to ensure that they don't spread and get worse. Can you post a photo of their feet so we can confirm the mites?
Also, taming isn't a simple matter of following instructions you read off of the Internet. It's important that as you work with them, you do so slowly and at a pace they are comfortable with.
After they have been treated for the mites, you can start to work with them again. Meanwhile, start the first step of gaining their trust by just sitting by their cage for long periods of time to read or work. This will help them get used to your presence. After they proceed with their daily activities even when you're sitting next to them and appear calm, you can proceed to placing your hand on the outside of the cage, and when they are comfortable with that (which could take anywhere from two days to several weeks) then you can place your hand right in the entrance of the cage, then on the cage bottom, then slightly closer, &etc.
As mentioned above, the forums have a great many resources to help you through this journey as well as to keep you updated on the very best practices for taming budgies
Be sure to read through everything, and if you have any questions afterwards, please do ask as we'd love to help
We hope to meet Leaf and Emerald soon!
Keep us posted on their condition, I hope they are able to be cured soon.
Best of luck!