you're clearly talented
you'd be a good pianist if you worked on your foundations so that they were rock solid - proper finger position, proper attack and release, proper flexibility in the wrist - maybe work with a knowledgeable classical teacher, I recommend Denis Zhadnov on youtube and insta, lots of tutorials on foundational technique
regarding the improv:
i like the dramatic flavor
not sure a chopin nocturne is a wise way to introduce your improv - how can anyone possibly continue on that level of sophistication and elegance?
I listened to 2.5 minutes... not sure a 15' improv is going to get listened to anywhere by anyone in it's duration, unless you're a genious... I would keep it to 6' max