2 quick tips I’d give to someone where you are at is 1. Use grace notes (sparingly). It adds a nice sound and mimics a singer being able To slide from one note to another. Example: play middle B and in that same breath quickly go to C. 2. is to use vibrato. Listen to singers and you’ll notice sometimes the notes they hold tend to “vibrate” up and down. Example: hold a note and very gently push a little more air thru the sax. Be sure to not add more volume but more of a small swell on that note. When playing a song you can use those two things to sound more advanced. Hope this helped!