This melody is a theme song from the opera "Carmen" by Bizet (bih ZAY)
Toreador, on guard! Toreador! Toreador!
It is written in 4/4 time. Notice the grace note in the second measure and play it as a B flat.
It will be played quickly and the following note, "A" will be the first beat of that measure.
Observe the fingering between the staves.
If you are using an electronic keyboard, find a rhythm with a Spanish beat.
When you can play it well slowly, then try it faster.