Did it! Now to change my wife's.
FYI - I told it to "Start with next month" because I had just paid my bill for yesterday for this month. It then goes to all the billing info. I told it "Credit card/only when I ask (something like that)". Then when I went to the next screen where it wanted all the card info. it acted like I would lose this months payment and start over with the new payment. I clicked "Cancel". However, it went back to a screen and confirmed I am set up to start $25 plan next month.