Samolot the Electra is a great model. As a matter of fact it was my first kit (now as an arf) it will be an easy build and as you said the electric motor will save you some $$ and get you started into the hobby. With a strong battery you can have allot of fun doing loops, rudder rolls, and even short inverted flights etc... Once you get more ambitious build a wing with ailerons and add that aspect of flying to your model. Or as bubbagates states learn the art of soaring- I have had flights up to an hour long with strong thermal conditions even with the heavy powered gliders.

A glider can train you to fly but it will teach you more about flying than any trainer can offer- Just get some assistance (i know you don't want a lecture) But I wouldn't feel good about giving advice at least saying this once or-twice. Also remember that it is tough to outgrow a glider or soaring for that matter.