Hi there and
to the forums!
Being puffed up can indicate being relaxed, and because Blueberry is puffed up and perching on one foot while in his cage, that means he's comfortable there. This behaviour is only worrying if they're puffed up all the time, which could indicate lethargy and sickness.
However, you definitely should not be handling them yet - it's much to soon to do so and even if they don't resist, they are most likely being submissive because they're still scared. From what you're describing, Lemonade definitely is, and even if Blueberry is calm, it's important to gain their trust gradually, not force it on them.
You should not touch or handle them for about two weeks, and during this time, sit by their cage and talk to them as much as you can. When they puff up and seem relaxed while you talk to them, that's a good sign! After the two weeks you should start re-introducing your hand slowly to them to ensure they get used to it at their own pace
Meanwhile, you've come to a great place to learn even more about the best of budgie care practices. If you have any questions after reading through the forums - including the budgie articles and "stickies" - please be sure to ask as we'd love to help.
We would also love to meet Lemonade and Blueberry when you get the chance!