Margaret, it seems at first glance that the responses you've received here are not altogether consistent. And to be honest, I'm not sure what's correct, i.e. can you connect yourself to your father or not?
But it's not that hard to upgrade to full WikiTree membership. Then you can definitely connect yourself to your father.
If I had my way, before you got more involved in WT (if that is your intent), I'd hope you knew what you were getting into. We have a one-tree structure here, which means every person is represented by only one profile. Once you add profiles to WT, you can't remove them. And we really want you to add sources when you create profiles.
If that's something you agree with, welcome to WikiTree!