I noticed recently how many folks were using cartoon images or avatars of themselves on Facebook, which led me to the App store to check out what they might be using.
There are many Emoji generators, some for free and others for a small fee. I chose the Emoji Me Face Maker, which I believe was free, but had in-app purchases for more hair and clothing choices. I made several versions of myself and my husband and thought it would be fun to do an Emoji layout.
One tip: When you are cropping images in GoodNotes, you have two choices. One is to crop as a rectangle, and the other is to carefully trace around the image which will eliminate the background. I really suggest using a stylus to do the second one because it gives you more control and allows you to see the image better than when you try to do it with your finger.
Note: I know there are similar apps for Android and Windows users, but as an Apple user, I'm not familiar with them. Check out your app stores, and have some emoji fun!