This is what the musical score looks like for the First Song Ever. This is part one. I will write a Part Two, which will be a melody line, but that is a future endeavor.
I wrote this song for prospective students, to show them how simple it is to play great sounding music on the piano. You don’t need to know any theory at all to play something.
I have a friend who has memorized over 100 songs on guitar, and he has no idea how music theory works. There are pianists that are the same.
However, they are exceptions to the rule.
If you choose to move ahead in your piano education, you’ll need to learn the notes on the keyboard, the notes on the paper score, and learn some timing. Not a lot, but enough to have fun.
This website contains all of the information you need to go from zero to something with practice. I hope you decide to put in some seat time and learn to play the piano. It’s a lifetime achievement and so worth the effort.