Adding images to sidebar widgets
You have a sidebar, so what do you put there? As an artist you probably have events in the near future or a gallery that represents you. You can use your sidebar to add images promoting the event or your gallery’s logo.
WordPress has the text widget for this purpose, but unless you know html code that will be difficult to use. For some reason they haven’t added the Add Media button or the Link button to the text widget.
You can create a dummy page that you keep as a draft to use as your text editor. Keep your WordPress edit window in Text Mode, not visual. Insert your image in the dummy page and make it link to the gallery’s site or the event site. Voila, you now have code you can copy and paste into your text widget.