My parents separated when I was 2. Mum moved interstate not long after. I had visits 3 times a year.

My Dad and stepmother moved in together when I was 4.
We didn't get on very well. I won't go into detail, it's a whole other post
Enough to say that in hindsight (with adult vision) there were a lot of things that could have been done differently, and some that were not as bad as my childhood eyes saw ITMS.

I lived with my Dad until I was 12, then I moved to live with mum.

My SM used to bag mum out to me. As an adult I can see why she did. She felt she had valid points and she probably did BUT as a child I did not need to hear it. It made me feel defensive, it made me sad, and I never ever saw my SM's POV until I was well into my 20's.

I wish mum had been closer. Three times a year was not enough for me, I used to count the days until I could see her but at the same time it was regular contact which is more than some get. And in comparison to my DD's situation, any regular contact is waaay better than nothing.

I hated hearing my parents argue, even on the phone.

I hated the way that I knew my dad & SM disapproved of mum. To me as a child she was my MUM and hated anyone to think badly of her.

I won't repeat everything Kelly said, it's great advice, I would emphasise this though -
* Do not talk about your partner in a bad/angry way in front of the children, about the past or present, things they did etc

* Do not talk of details of the divorce - someone once said to me that when her (older) children asked her, all she said was, 'thats between your father and I.' For younger children obviously its a little different. They can be very matter of fact when young which can be a blessing. But they can also bottle up feelings.
Basically, don't bag the other parent no matter how hard that is sometime - and I know - and don't bring discuss your separation, child support issues, contact issues , anything like that.

Let her have her own relationship with her father independant of the issues between the two of you.

I left DD1's biofather when she was 11 months old...
I could go into that whole situation but that's from a different perspective you know?
But I will say that when they grow older children have a remarkable ability to see things from a whole new perspective and I think it's really important to let them develop that on their own without their opinions being shadowed by anyone else.

Ok enough rambling from me PM me if you want hun I'm happy to chat.