Trying to make an informed desicion

Hi everyone. I am 31 and single and I have been thinking about adopting a teenager. which I realize is a not typical and not without its many challenges. It's something I would like to do. Growing up I lived in a home daycare, worked a summer camp, babysat part-time and various other child-related things. I have never been a parent I don't know what its like but after spending the first 18 years of my life devoted to children I feel like I am done with young children which is why I want a teen. I don't take this decision lightly and I really want to make an informed choice. The thing is I am clueless, I don't even know where to begin. I don't even know if I would make a good mother. I guess I am looking for advice and resources that will help me make the right choice on whether or not I am suited to be a mother, a single mother, and anything else that might help me decide thanks