Coming out to my parents

i'm 16 turning 17 in July, i've always been interested in females & had relations with females. I also like guys. But i'm tired of not being about to be myself around my parents and tired of having to hide things. My stepdad always talks shit about gay people and when he does it makes me not want to come out to them AT ALL. My mom is more understanding , she always said no matter how her kids come out, she'll love them regardless but i'm still scared of how she'll/both of them take it ? i want some advice as to what i should do or howwww i should come out.