You'll get a letter from UCAS in about a week.
You'll probably receive details from the uni about their accommodation etc, but this may take a while as they may send them out to everyone at the same time. Remember most people won't be making their choices yet. Some unis won't send things about accommodation etc til after results day though, so check their websites.
You'll need to apply for loans in around April. If you're going for income assessed you need to wait until your parents have their P60 (it's a tax form) so you get a later deadline than if you're going non income assessed. You can also decide to apply for bank accounts aaround this time, although most people wait until after results day.