The Pill, Prenatals, Planning to TTC-- advice please!!

My husband and I will be married 1 yr this October. We have discussed starting to TTC once we hit our first anniversary. I've been on the pill for 10 years (since I was 16) so I do not really know my body not on the pill. I know I need to start taking prenatals before we actually start TTC but I'm just not exactly sure when. Is it okay to take them beginning now even though I'm on the pill until at least October? If anyone has advice to offer I'd greatly appreciate it. I am working on kicking my long term coffee addiction but that is in the works. I'm active and weight train at least 4 days a week and mix in a little cardio a few times a week. I would like to be as healthy as possible when trying for our first little one. Thanks in advance for anything you can offer me.