To improve your vocal range, practice vocal exercises that target your upper and lower registers. Start with exercises that focus on expanding your chest voice, and then gradually work on developing your head voice. Try practicing scales, arpeggios, and slides, and gradually work on extending your range higher and lower. Additionally, work on developing good , such as proper breath support, resonance, and vocal placement. This can help to improve your vocal range and control. Finally, avoid straining your voice by practicing in a comfortable range and gradually working on expanding your range over time. Remember to warm up your voice before practicing and to take breaks when needed.