I a PPL, am currently studying the ATPL theory to be able to become FI, I'd like to be able to instruct IR (or CB-IR/EIR), privately before the 10 mandatory ATO hours or inside an ATO
keenpilot,
From what you have posted (you are PPL, currently with no IR or FI Ratings) this would not be possible.
A requirement to Instruct for the IR is to have 200 Hours IFR if an FI, or 800 Hours IFR if not an FI.
I am unaware of any reduction in these requirements to teach for the CB IR or EIR (does anyone know differently?)