You have made some great strides already! You got on a bike and you have come to a forum looking for advice. I would say you are well on your way! As for endurance, please do not be hard on yourself. You are up on that bike. Many others choose to do nothing. You will build confidence, strength, and endurance. Be proud of yourself! You have made a lot of progress in a few days.
This forum is filled with wonderful women of all different ages, shapes, and skill levels. I am new to biking (about a month now) and I am hooked. The saddle problem, that is not so worrisome, I am concerned about your hip. Does the pain heal quickly after you ride or is it sticking with you? If it is not going away, you may want it checked out. Biking should not hurt. It is possible your seat is not in the proper position. You could go have it checked out at your local bike shop or your husband may be able to fiddle with the seat adjustment for you.
As for the saddle-everyone is different. There is a section titled "saddles", read through those. Some places have a return policy, others do not. I bought a Brooks saddle and love it-I heard wonderful things about them, and they have a 6 month money back guarentee. So, I thought it worth the $67 to try it out-turns out I love it.
Keep up with biking. You are doing well. Set small goals for yourself. it is not a contest. Biking should be fun. Celebrate each milestone you set for yourself.
Again, welcome to TE!
Jennifer
“Live as if you were to die tomorrow. Learn as if you were to live forever.”
-Mahatma Gandhi
"We are what we repeatedly do. Excellence, therefore, is not an act but a habit."
-Aristotle