Hi
Yes it does get better. Whatever the reasons for the split it is hard to come to terms that your x has someone else and to worry about the impact that this may have on your kids.
I was in a similar situation in that my x left me for someone else and that was hard to take at the time. However, you need to let go - easier said than done it may seem - concentrate on you and the relationship with your son. The more amicable things stay the better for everyone. You do need to sort out the finances and contact so a
Consent Order may be a good idea - more info available about this on the site.
You may well find if her new relationship is getting serious that she may start to think about getting things moving herself anyway.
I think you're doing the right thing by getting information and taking things slowly. Only other advice I would give is that if you want further advice about settling your finances then if you post more info this may help. The info that is needed is:
Your respective ages;
The number of children you have and their ages;
How many nights the children spend with each parent;
The length of your marriage and any period of pre marriage cohabitation;
Your respective incomes;
Your respective outgoings;
Your assets - both soley held and joint;
Your liabilities.
I know you have already said some of this but it would be useful if you want advise from others that have knowledge in this area to have all the info together.
At the end of the day you will need to divide your assets but your timing may be important to keep things amicable.
My kids still have a great relationship with their dad 6 years on. I'm now remarried. Not to say things have always been easy, in the beginning they certainly weren't and I too fantasised about getting back together with x. Starting point to moving on is realising that this isn't going to happen. But there is hope, it does get better and you will get stronger every day.
Janey