Don't leave out your 'shoulders' and 'triceps'. Try starting out with a 3 day push/pull split example;
Monday - Chest/Ticeps/Shoulders
Wednesday - Back/Biceps
Friday - Legs
You can do cardio on the off days or ab and calf work etc... Don't worry about whey yet. Just make sure to
eat protein right after your workout. Stretching is good to do before lifting then just do some warmup sets of whatever exercise you are doing at that time.
Light weight to warm things up. Just my opinion and what I would (and have) do.