Keep posting, we are all here for you. Do you know when he'll be served? Have you thought through what you'll say to the girls?
I hope you can keep a practice going of self-care, self-soothing, whatever things even tiny that support you going forward. Do you have IRL friends who can come support you if you need it? Those two vacations coming up are looking really appealing and timing will probably be perfect for you.
One thing people talk about on here that I found really helpful in terms of thinking about D was that is is a business relationship gone bad. Once all the emotion is out of it, it is simply a contract you are working to extract yourself from with the best possible outcome. He has done everything he can to show you he's moved on. He really, truly shouldn't be angry or surprised that you're saying OK, let's get on with this, then. He will be, but it isn't fair or right. He's the one that broke the contract, not you.
Me (46) H (42) M:14 T:18, D9 & D11 4/19 - 12/19: series of escalating BDs 9/20 - present: R and piecing