To copy something or someone on your instrument can be difficult. I’ve made some exercises to practice this. You can viste the website www.virtualmusicedu.com, there will are free solfeggi more exercises. You can also follow a workshop (duration about 12 minutes each) about the topics: improvisation in a freely manner on your instrument, the blues, how to sound like a pro, the swingfeel and how to play along with the radio. With the songs you like.