Next click the $149 option. This is $50 cheaper because you are buying more than 3 days prior to travel. The 'starts now' option is for those that did not plan or purchase in advance.
From here you assign it to yourself when asked. Now it is connected to everyone on your My Disney Experience plan. You SHOULD be able to download everyone's photos when they have their Magic Band scanned. Disney also has your ride photos tracked by your magic band and added.