Once you select turn-based mode you can choose to play against one of your friends or pick a random opponent. The cards, the word you have to draw, and the category the word belongs to will appear after that.
If you do not like what you have to draw or you do not know how to draw it, you can change the card using coins. The option to do so will appear at the bottom left of the screen. If you choose to go ahead and draw what's on that card, press “Play”.
You will then have to draw. There is no time limit in this game mode. This way, you will be able to get inspired so that the other player can guess the word. Once you finish drawing, you will have to send it to the other player from the right hand corner of the screen.