I don't understand people who potty train that late. What are you, masochists? You can start potty training around the time they can sit, probably 6 months. Babies have a pee-reflex, where they start peeing as soon as cold air hits their genitals. So as early as 4 months, our son peed in the potty almost every time we sat him there.

Also, the regular poops are actually a thing among many babies. There's an app for that: lots of apps allow you to track diapering. You'll see patterns, and you can start putting your baby on the potty more frequently then. It requires involvement and patience, but you didn't just get a baby because you wanted to plop them in front of the TV until they're ready to move out, no?

The further advantage is that the baby does not experience potties as a novelty, but as a fact of life as it grows into consciousness. This way, it has a lower chance of rejecting them outright.

Also, use cloth diapers, seriously. It's not that bad. And the cost you pay for plastic diapers, both monetary and environmental, but also developmental, is very high.