First and foremost, work on YOU. Create what you want (law of attraction). Don't spend so much time trying to FIND the right person, rather someone trying to BE the right person.
Are you sure your child is ready? You have to make SURE the child can handle the situation, as well. You HAVE to make sure it is gradual and DO NOT even consider introducing a new partner to a child unless you are certain it is going to work. Any other counselor will tell you the same thing (I just saved you some $).
What about connections thru people you know? Best that it's someone who gave give a referral or a "thumbs down" rather than someone no one knows.
If you don't go to church, why not start? There are churches locally (Fishers) that have EXCEPTIONAL programs for kids. How about getting the child involved and you can meet other single moms & dads. Maybe the single mom has a brother. It's a win/win for everyone. Maybe you gain a little insight and patience along the way, have a great time, you AND your child make new friends and get to do new activities and who knows............Look at it from the standpoint of -- it would bring new aspects into our lives--spiritual, social & emotional. You CERTAINLY have nothing to lose and EVERYTHING to gain!
AND........doesn't cost!! I'd trust a situation like that FAR more than something over the internet.