As a child, my mom used to drag me to museums everywhere we went. I hated it. One day, when I was old enough to appreciate the art, I asked her- what makes a particular piece of art good? She told me that it was whatever spoke to you and sparked joy- as simple as that.
Also, when choosing art for your home or office it’s important to apply that same advice- choose something that you love and that works well with the style of your home. Art can provoke many different feelings so try and choose pieces that are bright and upbeat and put them in important places that you will see often like a focal wall, on the wall across from your bed which you look at first thing when you wake up, etc.