It's not your age it's because you are new. Many, not all guilds and quilting groups can be very clique. Ask me how I know? And I'm 55. I usually give a group 4 or 5 tries before I give up on them.
Now on the flip side of things. Often these clique quilters have been friends for years, been to retreats and shop hops together so they know each other well. They may only meet 2 or 3 times a month, so they look forward to being in each others company. At least this is what I often see when I join a new group.
Hopefully you will find a quilting buddy. I moved away so I lost mine, but boy did we ever have fun while it lasted!
Welcome to the board. You " have an old soul" and I mean this in a positive way. I had an old soul when I was your age as well. It's just now I'm a middle aged old soul. Just be true to yourself and you'll be just fine. The ladies and men on this board are great and are always here to help!