BikerBoy from Maryville, IL on 3/7/2020 6:09:00 PM:
Julia, so glad to hear you are interested in starting riding. I'd suggest taking your bike to your local shop (Cyclery in O'Fallon) and have them check things over for you. It's essential that your bike fits you properly, otherwise you can do serious damage to your knees, hips, etc.
As for where to ride, start out on the local trails. I'd suggest making use of the new trail going from O'Fallon up to Edwardsville, where you will connect with 130 miles of paved, off-road trails. You will never be too far from home if you practice on those trails. Go to mcttrails.org to see the map.
Once you build up enough strength and confidence, you can tackle parts or all of the Katy and other long-distance trails.
There are quite a few Metro East riders on this board who can offer you more tips.