Oh my! I can easily say lots on this subject! I thought I would be a better mum than what I am that's for sure. I did set my expectations quite low as we have no family here to support us. I thought I would be a breastfeeding, cloth nappy, cook everything from scratch mum...ha! Who was I kidding! I have had two children and yes they were both breastfed for two months for the first, two and a half weeks for the second, cloth bummed for the first for most but my son had better ideas - leaky leaky!
In terms of cooking everything from scratch - both the little monkeys didn't like my cooking!! They do now at almost seven and three.
I also had set myself ideal goals of getting them potty trained well before they started preschool - a big fail! My first, my girl, didn't want to until she was three and a half and no matter what I tried, she refused. She was dry from day one apart from the odd accident here and there.
My son, at three and four months, doesn't have a clue when he is weeing so there you go, no chance. He does have kind of special needs so I will be patient with that one...he doesn't talk for a start so that won't help!
I got stressed about sleep with my first, she had reflux so sleep was important when I had it, I thought I would be able to solve the sleep issue with the second, even with him having reflux - both due to a milk intolerance..nope I spent two years up with him. Long-term colic!
Best thing to set your expectations lower than you think and then everything will be just fine. You may surprise yourself and everything or it mostly will go well, if not you are still a good mum regardless. Your child is surviving isn't it?! ;)