It's definitely a nice piece/song (whichever you're calling it). However, I encourage you to try some new things. You having played piano for only 7 months now (likely self taught), it's somewhat hard to do that, but the continuing arpeggios, while nice, are super common now and start to get stale. Maybe try doing arpeggios, but adding in thirds or sixths in every other few notes. That'd give it some nice flare to it. Also, triplets are a beautiful thing when composing.
Thank you!
"but adding in thirds or sixths in every other few notes" - In my future pieces I will improve the arpeggios. But the main thing is that I keep my pieces in they original, natural form as they born. It was born under my hands during an improvisation, when I felt something like the music talks about. After that I wrote it down into a music sheet in it's original form.
If one time somebody check my previous pieces(example
https://www.youtube.com/watch?v=SNo3SIR9CSI(Lovely June)), he can see the evolution of my composing(little about my piano playing), because my current piece is an image about my actual composing skill

My main problem is that I can't play the piece, what is in my brain at the moment correctly. I can play harder pieces than my (for example River flows in you, Ballade pour Adeline, Hallelujah, etc.), but during improvisation I havent got this skill at the moment, so my own pieces can't outstrip on my playing skill

And I would like to keep the pieces in the form as they was born.