New Reference for practice
This is a more difficult one. the key is not focus on details and make sure your over all proportion and values are correct. then you can add details as you please. basically, if you look at your drawing from 10 feet away, does it look 3d and realistic. Make sure you post your drawings and any questions in the "post drawings" category under community tab. Reminding again, over all proportion and value, most important. Details like little dots or cracks, least important. These references are always optional of course. Make sure to go at your own pace and practice previous drawings/references if need be. You don't have to try this if you still having trouble drawing egg etc.