If I use him as my starting SF in my games, will the training sched consider him as SF?
yes all his minutes he plays there will count for training, additional minutes as SG didnt count but them as PF and C.
then I found out that I can't train IS for Shooting Guards. only for C/PF/SF.
maybe you could wait, for a loosy week and train it two position i am no big fan of this three position thing. Or you play him more often on SF and train IS over one and one, which is in my eyes even ebtter for a guard.