Well, a few thoughts come to mind. First, since Venus is so bright, the best time to look is just after sunset, as soon as you can find it, for 2 reasons. First, with the brighter sky, there's less contrast, this will help you see the shape. Second, it's higher in the sky right after sunset, so the sky is steadier.
Also, right now, Venus is still fairly round. It's 87% illuminated, so it's hard to tell it's not just a rpound disk. By the end of June, it will be only 71% illuminated, so it will be easier to see a shape...also it will increase in size by about 30% in that time. By July it will grow even bigger and become crescent shaped.