Miranda is okay. Bliss sounds weird, not because it's a word, but because of the mixture of sounds. I can't think of many names that would sound better with Bliss at the top of my head.
Caitlin Bliss?
Sophia Bliss? If there's a consonant in a weird place, then it will sound lispy - like
Nancy Bliss or
Anastasia Bliss. Must tread carefully with this one.
https://youtube.com/@MarioDrama632 or
https://youtube.com/@Objects_2763 :3