It's normal to feel frozen and not want to make any decisions because you don't want to believe it's happening, you hope by doing nothing that he'll change his mind and everything will go back to normal.
That's comforting but it's not practical to stay in that state for a longer period. He's actively planning to get out. He already has future plans that don't include you, and by doing nothing but waiting and hoping it's putting you and your daughter in an extremely vulnerable position.
You need to think only of yourself and your daughter's needs now, no one else's. Breaking it into practical steps may be useful. Most important thing is to contact a solicitor. Find out exactly what you are financially entitled to.
If he moves out how can you keep and pay for your home? Does he have a retirement fund/assets you are entitled to part of in order to pay him out or will you have to sell the house and split the proceeds? Ask the lawyer. It might come to that so research affordable property in your area. It might mean a one bedroom at first but any roof is better than none.
Don't beat yourself up about not having a job but you will definitely need one. No matter how much you are entitled to in regards to his assets that's finite and the key to keeping yourself and your daughter protected long term is financial independence. It doesn't matter where you start, doesn't need to be the best job in the world, but starting somewhere is better than waiting for something perfect to happen. If your mum could help with care for you daughter at first, after school care etc, that might open up your options a bit.
Good luck. This is shocking and life changing but you'll learn a lot along the way and probably look back and realise you've gained a lot too. Keep your eyes on the future and in the long run you'll be okay.