Does she go to school? She should be able to meet someone in her classes.
Is everyone in your neighborhood elderly? Are there parks nearby? Community pool? I'd think she could find someone to babysit or visit with some of the elderly... I am sure some of the elderly have grandchildren, etc.
Go to the local rec center or Y and sign up for some class... whatever she is interested in sports, dance, gymnastics.
Does she go to church? We don't attend a specific church but during the school year my daughter goes to Young Life and it is a very popular good activity which is Christain based.
What are her interests? Sports is a great avenue to meet people. If she has not started anything yet, it is harder to get with your age group due to experience.
Local pools... go hang out at the public pool. Most are less than $5 to get in and there are teens everywhere.
Many places have teen themed things... We love Top Golf, it is full of people of all ages. Dave and Busters, Main Event, etc.
Did she have no friends at school this past year? Are you new to the area? I don't understand why there are no connections at all.
Network. Do you work outside the home? Does your company have family day, etc for work?
Get involved... volunteer, get a job (some grocers will hire at 14 for baggers), get out of the house, be seen and interact with people.
Your neighborhood is probably a great place to start. Don't assume eveyone is old.. A lot of people stay inside a lot right now due to the TX heat. In late afternoon or early mornings, go on walks and meet neighbors. Who knows, there might be a babysitting opportunity.
Go to the school where she is scheduled to attend and get info. If they are closed right now, which they probably are, go to the school district website and get info on activities, clubs, and involvement opportunities.
Help her get involved. If she is extremely shy... maybe have her take a class. When my daughter was in 7th grade she went to an Etiquette Class for a week which was basic etiquette... place settings, sitting/walking properly, what utensils to use at a nice dinner, thank you notes, etc. It was a fun experience for her and it will bring you out of your shell if you are in one.
You have Firewheel Town Center over there with a lot to do, Hawaiian Falls Water Park....libraries, etc.
Best wishes.