Hi OP, congrats!
I got pregnant after a fling with an ex, I found out he had a girlfriend when I told him I was pregnant so I resigned myself to the single parent life from day one.
It was very hard and hormones certainly don't help! The worst thing I found throughout the pregnancy and since dd was born (she's 3 now) was not having anyone to share the good times with. I was alone with her the first time she kicked, rolled over, walked and talked and I just remember this awful feeling I had when there was no one to look over to and enjoy the moment with.
90% of the photos of me and dd are selfies as there was rarely anyone else there to take a photo of us. It's the little things like that that can make it feel like a very lonely experience.
Having said that, dd is a wonderful, happy, intelligent little girl and when I get compliments from strangers about her and her behaviour I can revel in the pride because I know I raised her all by myself.
Lots of things are easier because you know what's been done, what needs to be done and how you like to do it. Things are done your way and there's no arguing or compromising with a partner.
Just make sure you have a strong support network and a birth partner you can rely on. You'll need support but you don't need the father for that.
It will seem impossible at times and relentless most of the time but there will be moments when your child does something and you realise that despite what you think, you're doing a great job without him :)
As for when the dc is older, I'll let you know about that! Dd is just starting to ask and 'worry' about her dad. She has contact with him now and again but needs constant reassurance that he loves her and is thinking about her. It's really quite heart breaking to watch but I'm trying to explain it the best I can to her :)
Good luck xxx