A larger plane (wing span) rolls much slower than a smaller one and generally is slower in all movements giving the beginner more time to react to the inevitable goof. Also the can be seen clearly a longer distances reducing disorientation. But as YNOT has stated if you seek propper instruction and get a talented instructor you could be tought proper flight skills on a 30 in wing span 3 channel electric.

EDIT// Oh yea! Get the bearinged OS or Thunder Tiger engine as it will be moved into your next plane and a bushinged engine will become a paper weight.