Infant care waitlist reality — how early did you register?

Just found out I'm pregnant and everyone is telling me to register for infant care NOW even though I'm only 8 weeks. That feels insane but I'm reading about 12–18 month waitlists. When did you register and how long was your actual wait? Are government-subsidised centres really that much harder to get into? We're in Sengkang — any specific centres you'd recommend there? Also: does it make sense to register at multiple centres simultaneously?