+1 on what Dan and SD said.
Be more sure of what you want to do with the rhythms of what you play.
Your melodic ingredients sound fine.
You could probably help yourself during practices by trying to sing or hum to yourself the melodies you want to improvise - think about which of these melodies you like, and what you would like to hear next after the last measure or two that you just improvised. When it feels pleasing to you, it will probably feel that way to your audience.
Be more sure of what you want to do with the rhythms of what you play.
Your melodic ingredients sound fine.
You could probably help yourself during practices by trying to sing or hum to yourself the melodies you want to improvise - think about which of these melodies you like, and what you would like to hear next after the last measure or two that you just improvised. When it feels pleasing to you, it will probably feel that way to your audience.