Trainers are good for first kits, because the instructions and plans are for beginners, with lots of tips and extra instructions. Sig makes good kits, and the LT-25 or LT-40 might be good to convert to electric. Likewise the Goldberg Eagles, and I believe Hobby Lobby has a kit version of the electric Telemaster (or one that could be converted.)

If you don't like those, I'm sure others will have good suggestions.
Best wishes,
Dave Olson