Deciding when to call it quits

Baby is almost 19 months, and we’ve been down to just a morning feed at this point. Have thankfully night weaned (working on weaning from the pacifier as well).

Is it usually baby who weans themselves, or is it a conscious action I need to take? I wouldn’t mind making it to the two year mark per recent medical guidelines, but not sure what the ending process should look like.

I will admit it is a bit bittersweet - it was so hard at the start. Anybody have any advice on this front?