Nah, it'll be simple - swap from nappies to pullups, tell him it's time to use the toilet (or a potty if he prefers) during the day and remind him frequently - most kids pull at themselves if they need to go.
Then if you're getting lots of dry nights, tell him you think he's big enough to not need a pullup at night as well.
You might get a few accidents, no big deal, carry spare pants and wipes in your bag and have a mattress protector and quick drying bedding for rapid bed changing.
He's likely to be physically able to recognise the sensations at this age - some children take longer at night (which isn't a big deal, anyhow) but if you're working with his own body development, there's a good chance it will be incredibly easy, especially if he's going to preschool.
Potty training isn't a thing if you wait - most children will train themselves and you just guide them to using the toilet instead.
ExMIL looked after DD1 loads and reckoned she was toilet training DD1 at 9 months. I didn't see the point and kept her in pullups, just leaving a potty available if she wanted it, such as before a bath or if she wanted to copy when she followed me to the toilet. With DD2, I was at home and thought there were far more important things to do than worry about it before she had developed the neural connections to make it possible.
They both became clean and dry day and night at almost exactly the same age. I just had to do significantly less washing than exMIL did. and my carpet didn't smell of wee