How do i hang curtain rods properly?

Go higher and wider than you think. Brackets a few inches above the window frame (or halfway to the ceiling) and several inches past each side, so the curtains stack off the glass when open. Mark both with a level, not by measuring down from the ceiling, ceilings are rarely straight. Use wall anchors unless you hit a stud, and add a middle bracket on anything long so it doesn't sag.