This is the MIDI file of my version of "Star Trek Voyager" Theme Song as I performed it on my Youtube channel at https://youtu.be/OZ1SyQ6jl8E
To learn to play this, Synthesia is highly recommended! You can learn it much quicker that way, as well as being able to see the music notation. (available at www.SynthesiaGame.com)
Almost any DAW or sequencer software capable of handling MIDI files should also be able to display the music notation.
Again, this is my version of "Star Trek Voyager" which you should check out on my Youtube channel (above) to get a flavor of what you'll be able to play once you learn this piece with Synthesia.