You turn invisible until the spell ends, but only from the perspective of one creature you can see. Anything you are wearing or carrying is invisible to the prespective of the target creature as long as it is on your person person. The spell ends if you are attacked, attack or casts a spell.

At Higher Levels. When you cast this spell using a spell slot of 2nd level or higher, you can target one additional creature for each slot level above 1st.