Roo power is right but you probably won't gain any time by changing on to the Metropolitan line, just stay on the Jubilee. It stops at other stations but you might just as easily spend the time standing on the platform waiting for the other train.
As stated, take the Victoria Line (northbound) for 1 stop to Green Park. Then simply transfer to the Jubilee Line (northbound). Wembley Park is 11 stops along the line.