For my full course on how to learn to play the piano for beginners, go here:
Use 'licks' in your solos. Try to make a 'library' of licks that you can use in your solos and that you can transpose in other keys.
This is a sample lesson of the course 'Learn to play the piano from scratch', a piano course for total beginners: learn the piano, music theory, reading music and improvising with lots of play along tracks.