Artists use software like Adobe Flash, Photoshop, Illustrator to draw and manipulate 2d artwork. 3d is often done using software such as Maya. Give them a search on google.
As a Sound Producer, I use FL Studio to compose all my music. But like 2d and 3d software, there are tonnes of options such as Logic, Nuendo, Cubase, Pro Tools and Ableton.
It’s actually pretty cool to have a range of skills. I’m a practicing artist as well as a sound producer. However, Music is my overall strength and that’s what usually happens, you have to eventually specialise in a certain area.
Hope this helped:)