...since I haven't played the piano for a long time and I've just started again, at home, on my own
What struck me in your performance was that your keyboard is moving while you play and you do not bother lol. Admirable!It is a difficult piece that requires fluency and ease. Keep on working on it. I would love to hear your next recording. If you work hard on pieces like this one - you deserve a piano:-) ( I mean real piano)
It sounds like the entire waltz is in E flat, rather than D flat Still, not a bad performance.