I think as a baby, he’s probably not really going to start “expecting” food just yet since he’ll have unlimited (but measured) pellets until about 6-9 months. Hay is always available, 24/7, of course.
My bunnies get their veggies in the morning, and THAT is what they expect. When I get up, they are sitting and waiting by their empty veggie bowl, or Max will flip the bowl in the air if it stays empty too long (like if I decide to sleep in on the weekend). They only get pellets in the evening, so by 8pm, they are sitting next to their empty pellet bowl. They definitely know what they get fed when and I think they find comfort in the routine. Bunnies love consistency.
Something you can start now is a trigger word for when you feed. I say “num-nums” and wherever bunnies are, they come running to see what I have. I like feeding veggies and pellets separately (12 hours apart) b/c I feel it helps with their digestion (esp. for my finicky mini rex) and it gives them something to look forward to morning and night.