if you are just starting out dontdon't worry about isolating muscles and fancy exercises, just stick to the basics for power and size and then when you have the size and strength you can concentrate on the isolating. day 1 chest -Barbell bench press and Incline barbell bench press and a days rest
day 2 back- Dead-lift and Close-grip lat pull-downs and a days rest
day3 legs just do squats and a days rest and start again