Well, it seems I was into poppies while creating this class. Never mind, choose any flower you enjoy drawing. If you are not used to draw flowers, I recommend you to choose one with just a few petals, like a poppy! XD Also, fully opened flowers are usually more difficult to draw than the ones that are starting to open.
If you get stuck somewhere feel free to ask as many times as you need. We are here to learn and have fun! :)