RE: is a spad sns.40 a good beginner plane
Nope. a SPAD SNS is a BAD beginer plane, they were designed for .40 combat and as such have all the wrong characteristics for a trainer.
a Good SPAD trainer is the Debonair, BUHOR or SPADet, stick with one of these for your trainer and you'll have no problems learning to fly, well none more than usual.