I love Python. It's a simple language to learn and code with and there are so many possibilities with it to create whatever project you want. It's actually the language that I used to help build one of my previous websites, Hive Gamurs. I used Python & Flask to build it and it was an extremely fun project to work with.
I would rather have the site have some sort of content before fully opening because it's important to try and get some users when you first advertise your site. If your site has no content when visitors come on it, they are just going to get bored and leave the site.