Hyphenated first name

Thinking of changing my first name legally this year. I am changing my first name given at birth to a childhood nickname that I had growing up which fun fact, was initially going to be my first name, but my parents changed their mind. Anyways, it would be Bella Vita. My question is, do I hyphenate the two or leave a space? Not sure if it is correct grammar wise to leave it with or without the-and or it is more of a hassle legally. Thanks!