Hi quilting aggie. I'm not sure, but you might try just googling on line interior decorating class. There may be something offered by some of the 2 yr. techie schools that will help your friend out.
I'd be very careful though..my degree is in Interior DESIGN- a full 4/5 yr. program and designers nowdays must be licensed by the NCIDQ. That requires testing and "real world" work requirements and of course..money.
Good luck