Welcome to WikiTree, Robert! You can upgrade your Membership and start building your family tree on WikiTree.
It sounds like you already have a lot of information. When you get to the person that you need help finding, it will be easier for us to help you if you are able to connect a profile to your post. If there are already profiles of some of your ancestors on WikiTree then you will only need to connect them to your line.
If you have any questions about how WikiTree works ask your Greeter. Again, welcome and I hope that you will enjoy WikiTree.