Victor: Welcome to WikiTree. With all the research that you bring, we are lucky to have you. I imagine that many of your ancestors already have profiles on WikiTree. Once you become a member, you can start adding your parents, grandparents, and great-grandparents. I would not be surprised if some of your great-great grandparents already have profiles on WikiTree. Perhaps, one of your great-grandparents' profiles may already exist.
In my case, several of my great-great-grandparents already had profiles on WikiTree. I just had to connect my great-grandparents to those profiles, and I was connected to WikiTree's One Global Tree. I was connected to our Global Tree before the end of the first week of my membership. I had a lot of family records, but information from WikiTree members has been very useful.