My latest corset acquisition and discussions

I received my new corset recently and finally tried it on this morning. It’s an overbust style (though I still need to buy some breast forms), and I’ve had it laced up tightly all the way closed for about four hours now. I didn’t think I’d be able to close it completely during that first wear, but amazingly, it feels great. As mentioned before, it’s been on for roughly four hours; how long should I keep it in for my initial period without worrying about problems? I really love the shape it creates!