Vanguard is a very good investment company. It offers many investment vehicles, including real estate investments. Since it's a firm that is actually owned by it's customers, fees are extremely low with never a sales commission. I mentioned GNMA only because you seem focused on real estate. This is not to be confused with Fannie or Freddie. GNMA has always been a package of
fully guaranteed by the feds Home loans.
$100K is a nice hunk of change. I would strongly suggest you take your time, do more study.
Begin by clicking around here:
https://personal.vanguard.com/us/home
Be sure to click on "what we offer".