So now that Ben's home and I'm able to ask him what his grandparents name are (and how to spell Haberstroh), I've found a lot of information on new.familysearch.org. Turns out the Church transferred over all the information anyone has ever added into their old systems (makes sense). So the good news is, you probably don't have to add in any of the information you've already put in the Church's systems. Technology really is amazing. Just create your own account and all your information will be there.
One thing that took me a while to figure out. You can't share information on living people; this means we'd all have to add siblings to our own accounts without sharing. But once one person adds a deceased ancestor, the info goes on everyone's chart.