Sig has a small electric version of their Seniorita, which is an excellent first trainer. It is not RTF, but would be very easy to assemble as an ARF.
I'm not sure if it is still available, but go for a balsa model, not foam. Although foam models are easier to repair, they don't last as long and I find they rarely fly as well as a comparable balsa model. Balsa also stands up better to minor abuse.

The Alpha 450 you posted looks great as a first model. I am teaching my little brother on a similar model, a 3 channel PT Electric, built from a kit. We have been doing fast taxies and short, straight line hops, and he has gotten the hang of it after about 30 minutes.

Do get an instructor - in anything but dead calm conditions, a smaller electric trainer will be blown around a bit, and an instructor with a buddy box setup will help immensly.

Good luck and happy flying!

Graeme