Hi Allie and welcome.
Im a newbie too and this forum is great for laughs and a wealth of riding knowledge.

If what my husband saw at the LBS the other day was anything to go by riding sure does help to keep you a fit oldie. He went down to get a few things checked on his bike and while he was there this older lady came in. She was asking the guy at the shop about some really small frame bikes and the LBS guy told her that a frame that small was a childs bike. She told them that as she got older she seemed to be getting smaller and was unable to keep riding her larger frame. She was not going to give up riding , she had ridden a bike since she was a little girl and if it meant getting a kids frame to keep her riding then thats what she would do. She was 78 years old.