Can anyone evaluate my Mandarin? What should I work on?

https://how-to-learn-any-language.com/sounds/index.asp?sound=200 Here is the sound file (me talking): https://how-to-learn-any-language.com/sounds/200.mp3 I had no special idea so I just made a simple thing lasting a few seconds. It’s not very good, I know, I just wanted to hear myself speaking. I’m very disapointed with how my chinese sound 🙁 What should I …