I realize you have a few years of electric flying under your belt, however, glow planes are a bit different than electrics. The most noticeable feature is that they are faster than the majority of your electrics. Another couple of items are that the majority of your glow planes use ailerons and the response time of a glow plane is also noticeably faster than many electrics.

I would suggest going to the flying field and seeing if someone can take you up on a buddy box with a trainer 1st. That will allow you to judge the skills you presently have on a glow plane and decide if you want a sport/scale plane (such as the Beechcraft Bonanza ) for your 1st glow plane or something a bit more sedate.