I staged it.
we started at 6 months with just lunch. This was mainly to get him used to foods and flavours.
After about 2 weeks, I introduced breakfast too.
Last week, we introduced an 'evening' meal for him too (about 4pm)
He still isn't really eating anything yet, but I am just getting him used to these rough meal times.
From the beginning, i just sat him with us for any meals he ws awake and in a good mood for, whether that was one or three or none, breakfast, lunch or dinner. It was a good few months before I consistently organized meal times so that he was eating 3 a day. It worked well for us and he now eats 3x plus snacks. It just naturally evolved that way and the less I thought or planned it, the easier it all fell into place on its own.