Great question Eleanor. Creating great looking, effective visuals has never been easier. There are a lot of great options - one of my favorites is Canva. It's super simple to use with lots of great looking layouts and preset sizes for whatever use you have in mind. Believe it or not, I'm also a big fan of using PowerPoint for creating visuals. It gets a bad wrap but it's got some pretty good image / graphic creation tools built-right in and virtually everyone already has easy access to it.