I do that also, I Ieave their food inside the cage and let them fly around my room and they know where to go back when hungry.
When it comes to taming, I give them millet. I'm planning to use a clicker with that. Where every click means a treat to train them to come to you. Also, I do feed lime using my fingers with seeds. Its an improvement. Lemon only eats near my hand when I use a spoon or a cup.
Im gonna try to clicker train them once it arrives 😇