BELIEF ISN'T NECESSARY. You can manifest through disbelief AND you can manifest through any emotion. The whole point isn't to believe. It's that anything is possible and you WILL get exactly what you want, even if you don't believe in it. The point is that you INTEND for it to happen. Whatever you INTEND to happen in your reality will happen. Your INTENTION is what matters in manifestation. Not the affirmations, not the emotions, not the beliefs.
As long as you intend to get what you want, you're literally all set for the rest of eternity.
So, yes, you can say "two flying barnacles" and manifest an appearance change if the intention behind that phrase was to manifest an appearance change. It literally does NOT matter which words you use to affirm, only the intention matters.
You are in fucking Barbados, stop playing around. Slam the fucking door on anything that says otherwise and PERSIST. Stop changing your mind and discouraging yourself. FFS! Who the fuck is the operant power? You or the 3d? You or your reality? Stop letting something powerless rule over you!!!!!!!
Notice how when you assume what you want, you feel good and satisfied? LEAN INTO THAT! Just KNOW it's done!!! Knowing is manifestation!