I wish my name was fruitsalad tbh

To your credit Im like 90% sure it should be "a", due to it being a consonant sound.

It is.
Just like when you say "an hour"
H is not a vowel but is sounds like one

Atomic, you mean that the h is silent, so because it sounds like the first letter is an o it is said an hour, right?
Same with this. It's spelled Ouija, but sounded like weegee. That's why we say a Ouija board.

No I mean my username

Shut the frick didlly tick tack up. Now go legally change your name to fruit salad.