I can't even play the music when I watch it. How to accompany with your left hand? Fingering! Can you talk about it? thank you

From your question, we can see that you don't know much about piano playing. I suggest you teach yourself some basic music theories first. According to the music score you provided, your left hand should be mainly responsible for the sound of the bottom line, which is a single note, without considering the fingering. It should be that the fingering of your right hand will be more complicated and difficult to master, especially the rhythm ~