Preconfiguring widgets for network sites?

I’m new to multisite, so excuse my ignorance, but can I pre-configure which widgets will show up in a network site? I want to allow users to sign up to the main site, create a blog, but not have to deal with configuring everything to get it to look good. I want to remove as much configuration as possible – let the user set a blog name, and then get their site and start blogging. Thanks.