It's never to early to start
Early potty training is linked to "holding issues" later as well as bladder issues in later life Elimination communication (where you're watching for signs they need to go but they aren't learning to hold it till you can reach a potty) especially when out and about is totally different to potty training At this age I'd go with the flow at home but ot when out and about just yet, do that when the weather is warmer and they're using at home without issue
Bahaha that’s so cute 😂😂😂 and to wipe his butt! Bahaha so cute look up ready signs for potty Can he tell when wet or dry? Pull his diaper/underwear or pants down/up ? Is he able to communicate that he has to go?