Even if you install something like Reaper, if you have no former knowledge (ie transferable skills) of a DAW, then you'll want to get into the habit of watching tutorials and Googling certain processes.
With regards to setup, I've never had an issue with setting up Pro Tools First, however I am on a Mac.....I've not tried specifically on PC.
I think as I've said before, if you're looking at band type demos, then I would look at Reaper or Cubase LE, because they're the products that will support you moving forward, Reaper is fully featured, and Cubase has upgrade paths. My opinion of Tracktion is that it's fine, but isn't as fully featured as Reaper and you will eventually have to relearn another DAW if you outgrow it. But obviously each to their own.
If you should have any further issues setting anything up, please do give the Focusrite tech support team a call/email/live chat. They're there to help you at any part of the process, including software setup, especially helpful if the issue stopping you doing what you need to do is simply a Windows option (more common than you think) as opposed to anything in the box or what you're doing:
https://support.focusrite.com/hc/en-gb/requests/new
Si // Focusrite Media Relations