A friend built an RV-3 as his first project. He had to use some ingenuity to figure out what to do in some places, but he succeeded in building a very nice aircraft. As near as I can tell, an RV-3 is a very good project for a new builder, as long as the builder has realistic expectations. Understand that the plans and instructions leave a bit more for the builder to interpret, nothing is prepunched, and there are probably not any other local RV-3 builders to lean on for help.
If you are mechanically inclined, and a problem solver, you would probably be very happy with the project, as long as you never visit a builder of one of the new prepunched projects that almost assemble themselves.