So it all comes down to your confidence.
Like most things, practice, practice, practice. Weight is not an issue. Really, are you going to carry that Honda Rebel or ride it?
I think a GL1500 or GL1800 are very easy to handle due to their low center of gravity and low levels of noise and vibration. Add linked brakes, hydraulic clutch and reverse to the mix and you'll know why some think of it as an Old Man's Bike. Fuel injection on the GL1800 is one less thing to worry about (no choke). Do not even consider using the radio or cruise control until you have confidence in the basics.
That said, perhaps find yourself a $800 bike in the local classifieds. Look for a wing after you have built your confidence.
2015 Goldwing, black
previously: GL1200 Standard, GL1200 Interstate GL1500 Wing, GL1500 Valkyrie Standard, 2000 Valkyrie Interstate and many other Hondas