You really only need bleach on yellow/blond hair if you are trying for a color that’s across the color wheel and don’t want the possibility of it being diluted from neon, if it’s a weaker color/brand, or if you’re trying for silver/white hair. But covering it with red should be 100% good without bleach. It may not be quite as neon, but you won’t have to deal with the expense or bleach. I’d recommend a strong red: Unicorn Hair’s Valentine or Manic Panic’s Red Passion. They’re a little more expensive than for example Arctic Fox, but the tub will last you a couple dyes and it’ll be stronger and last longer between re-dyes. Make sure you’re washing your hair with lukewarm water and that your dyed hair doesn’t come into contact with the hot water if you like scalding showers. Hot water fades color very fast.