ORIGINAL: dredhea

The same advice we give to every beginner that gets a nice aircraft or two. Add a trainer type plane to your collection, find and join a local club that offers flight instruction and keep the ''nice'' airplanes in the garage until you gain the skills to fly them. Flying isn't hard, but you need to be taught properly. What you have there would be the equivelant of letting your teenage child learn to drive by entering them into the Daytona 500. Getting a flight instructor to teach you to fly will greatly improve your chances for success.
Letting an experienced builder check out your work at several points during the construction of these planes would also be a good idea. That would prevent getting to the field and being told that they aren't airworthy, or worse yet, finding out that they aren't airworthy while they're in the air. Many people don't understand the level of workmanship required to build a good, solid and most importantly, straight airframe. An experienced builder will save you from taking whole sections of your plane apart and rebuilding it to fix problems.
You got quite a deal on those models if they are in decent condition and complete ( all the parts are there).