How can i get better handwriting?

i really hate my handwriting and i wanna change it. its not that it is messy or unlegible or anything like that, its just that my handwriting looks too much like a elementary or middle schooler's handwriting. and im in my junior year in highschool now. i want to get a handwriting that is more fluid and looks more professional/adult-like. but i dont want to write totally in cursive, i want to mix cursive with print. i am looking for tips (like write slanted towards the right), not answers like take a penmanship cl. thanks