First...How the Hell did you only get a $100 Federal ticket?? Those badboys are usually in the range of $300 to $500...
I don't know for sure that the feds will add it to your driving record, but as searched above, probably not. Moving violations, other than DUI are usually petty misdemeanors, and probably wont' go from the Federal Level to the State Level. Also...No one reports anything to your insurance. If your insurance finds out, it's because they pulled your driving record and they happened to see it. Most of the time, it depends on your relationship with your insurance company. I have never had one increase my insurance...Been lucky so far.
Now...There's no reason a federal judge can't send you to driving school, and most of the federal judges I know are reasonable guys...Just like a normal Metro court or Magistrate court judge, just in a bigger court room.
What ever you do, don't ignore the citation. That WILL get reported to your state, and they'll suspend your driver's license for Failure to Pay Fines. That will piss off the judge and you will end up making a house payment to a Federal Magistrate.
Those tickets suck...I haven't had one, but with all the federal land around here, I know lots that have, and I have friends in the Federal Court system.