100lbs isn't enough because very quickly you will be able to squat 100lbs. The 200lb set is better, but you need some 2.5lb weights and you may also need to get some washers so you can make 2.5lb jumps for upper body strength. 5lb jumps on upper body can get a little difficult after a while for women. Also, if that really is an olympic bar, you might find olympic lifting fun so the oly bar will be helpful if you get into that.
Female, 5'3", 50, Starting weight: 163lbs. Current weight: 135 (more or less).
I can squat 187.5lbs, press 75lbs and deadlift 200lbs