Help! How to introduce baby to food

We are about to start baby on some purées. I have some questions though.

My pediatrician said to feed her once a day at first, and rest of the day milk of course

At what point should I transition to non-puréed foods? I know a lot do baby led weaning, I think I would be comfortable with that after she has a bit of practice with purées at first though. Do you think like a month after purées? Or longer?

And at what point do we up the amount of feedings a day? Is it after a month?

When do I start giving her water?