Hi OP. Most people are quite nervous when they start ttc. I’m ttc#2 at the moment, so not a complete rookie but there are still plenty of things I worry about, finances especially. I think that’s really really common.
You will have to let go of comparing yourself to people as a mother. Honestly, it’ll drive you ABSOLUTELY nuts otherwise. Some mums are so good at projecting an image of perfect family life and ease, but it’s very rarely what goes on behind the scenes. Different people have different priorities as well. My DMum really surprised me last night. She looks after my DD about once a fortnight and I always come home to a tidier home than I leave, which makes me feel a bit rubbish sometimes (it’s lovely that she does it, but I feel like I should be managing better so it’s tidy when she arrives). I put it down to the fact that she’s had kids, and maybe she finds it easy to look after 1 when she is used to juggling 2. Turns out she thinks I do really exciting and educational things for DD and said she wished she knew how to do more of that and worries that my DD is bored with her. I couldn’t believe it!
Also, people may appear natural with their kids. I was always horrifically awkward with other people’s and worried I wouldn’t be comfortable with my own. But it doesn’t work out like that because you have plenty of time to get comfortable with them as a newborn and they won’t remember any of it! By the time they are moving/talking/forming permanent memories you know them so well that it is surprisingly natural. I never thought I’d say that before I had DD.
I was sick throughout. That was grim. But I’m still ttc again, so that tells you even really bad morning sickness is not impossible to cope with! It’s very unlikely you’d have very severe morning sickness, most people get through it without too much difficulty. People are more understanding than you realise as well. When you are ill, it feels awful to admit it, but remember that any women with children have probably been through it and will understand, and most men with children will have seen their DWs go through it. They are all more sympathetic than you realise until you are in that situation.
BUT if you are not feeling ready for it, don’t do it just yet! Enjoy your wedding and don’t let nerves spoil it. You want to be able to look back on this time and smile. Once the wedding is done, you may feel like it. If you don’t, there’s absolutely no harm in a little bit of a delay. You and your new DH can enjoy some time together first and that’s totally ok. I bet you’ll find you soon want to ttc and the urge will override the nervousness and you’ll feel ready for it.