The general guidance is to begin with 1 meal and to increase to 3 meals by/at 8 months, so there is no hurry. If you increase sooner you might see too much of a drop in milk intake, if that happens you can always cut back on the solids a bit.
My own experience, like MJ&N's, we progressed very quickly, my DS loved solids and I followed his lead on portion size and number of meals, I saw no drop in milk intake (although he was never a milk fan anyway and when he got his hands on 'real' food he acted like I'd been starving him for months!).
With BLW it may be that you increase the number of offerings/meals in the day but that LO does not take a lot at each sitting, exploring tastes and textures more than *eating* although for some (mine) it was very much about eating from the get-go.