For starters, I can tell you this is an extremely hard task to do, and that is an understatement. Everything is easier said than done. I know because I have tried it before, so I salute those who have done this successfully.
There is a fish breeding forum here as someone pointed out. That is the best place to get the info.
If your clownfish lays eggs now, it will lay eggs again a few more times, like clockwork. The number of days between laying eggs and hatching etc are all described in the other forum, and it is amazing that it all happens exactly like clockwork.
The furthest I have reached is I think 12 days then the clownfish fries died.
Having said that, I'm not going to ever do this again. Good Luck!