Good decision. I would also say the Sig Something Extra, Four Star, or similar plane would be a good choice for a first build. You will learn a lot from this type of build.
If you are interested in the particular warbirds you mentioned, the Val, with it's fixed gear, would be simpler to build and operate. Of course, what is a good plane to start with building is a wide open question. A lot depends on your background. If you've build some rubber powered planes as a kid, or have mastered other crafts, it may be possible to attempt a more complex kit. Just don't try to take on more than you truely believe you are able to handle. Getting into a project that is beyond your abilities is a good way to kill your enthusiasm for the hobby. Better to finish a too easy kit and be ready for another one, than it is to have one that was too complicated sitting in the attic years from now.

After you've built a sport kit or two, and are ready for that warbird, I would recommend checking out the series of videos from Dave Platt.
Another source of great information on building, which I would recommend now, is the website by Paul Johnson at
http://www.airfieldmodels.com/index.htm

Welcome to the hobby, I hope you find joy in building

Scott