Do nearly the same, what do you do on live game

draw your cards hidden on board, opponent chooses one and draw this
to a free square card field, then you take back your cards into hand.
You can select all your cards into hand at once
(suggestion, keep your cards into hand in 2 rows),
if you draw a "rubber line" with selected and hold left mouse button around the cards,
then you can draw it all at once onto board