I get it. Do you have a specific parent you are closer with? If so you could talk with them alone, it could be less overwhelming. And do you know how your parents think of LGBTQ+? I know my mom is fine and even has a friend who is trans, but my dad calls a lot of people queers as an insult. I told my mom because I am closer to her, though she did not believe me (idk). And lastly, if you don't feel like coming out yet, or are super nervous, you don't have too yet (though nervousness is completely normal, I assure you).