Hiya definitely, we organised our wedding in less than 5 months. And as you already have your venue, that is one big thing off your list. I had to look for a sample dress as you can just buy them off the rack rather than having to wait for the boutique to order it in as it can take a few months? I found mine in Memories boutique in Temple Bar.
At the end of the day, the day is about your and your partner with your loved ones.