Quoting 5 blessings so far....:" if you trust he is okay caring for an infant than the time w/him should start asap to get her used to ... [snip!] ... to get her used to it and you used to it. The longer you put it off the harder it will be for both of you to transition....."
There is no set time frame for visits and it's basically what you two work out. Sit down with him, have a calander handy and discuss visitation, set times and backup plans. If you two get along it will be less stressful for all involved and will keep it out of the court systems.