I agree with Tom that applications are critical. I haven't really tried LibreOffice applications yet but I did try Gimp and it's really good as a photo editor. I've been using Photoshop Elements on my Windows machine and it looks like Gimp will do essentially the same things as Photoshop Elements. But I haven't worked Gimp hard yet. Like all applications, it takes time to really know the ins and outs of the program so that you can do your work quickly.
What has surprised me is how good some of the common applications are - mail, calendar, and Gimp so far - but I'm still exploring.
Mike
Go into the world and do well. But more importantly, go into the world and do good.