1.) Note names Start by learning to identify notes, by acronyms such as FACE, All Cows Eat Grass and etc.
2.) Flash Cards You should be able to identify all flash cards within 3 seconds on Bass or Treble clef as well as the first 3 ledger lines.
3.) Intervalic Reading The next step would be getting good at interval identification. A perfect unison(xd) to and octave should be enough for the start and don’t worry about the black keys, that will come later once you are more advanced.
(By the way perfect unison is a P1st like C to C)
Homework: sight read 5 pieces and report how it went, or record yourself and post.