When I starting riding again in 2006 at the ripe old age of 45 I thought I was doing great when I could ride 5 miles. Then I started riding from my house to the beach 5 miles away. I had to rest over 1/2 hour before I could ride back home and had to stop halfway even then.
Eventually I worked my way up to 20 mile rides. I even bragged about how good I thought I was doing to the gal at the LBS when I could ride 30 miles non-stop after 6 months. Now I can ride an average of 80-100 miles per week (weather and this old busted body allowing) every week. It's been a long road as most here can attest to.
But,
It all starts with an internal "I ain't taking this anymore!" and sticking with it when it hurts and no one else seems to either care or want to play with you. Eventually you will get to the point where you can ride really long distances and people will notice the chance in your appearance and even your attitude toward living your life instead of just inhabiting your body.
So,
This is the place you're looking for. A place where you can cry when you fall and laugh in a good-natured way with the rest of us when it happens to someone else. We all have stories about how and why we started on the path we are on and we understand and support you while your story unfolds.
Welcome.