Where do I start?

This week was exciting and frustrating. I started using some of my new skills and knowledge to start building my tree in Ancestry.com. Much of my family history has been worked on by others and my tree in Family Search is full, but not done (is it ever done?) I am concerned however about what in my family search tree is correct and what is not correct and what do I do about it? So, I started building my tree in ancestry.com focusing on sources! I don't want to add someone to my tree if there are not good sources. I started with just one line and started adding to it, using family search, but paying attention to the sources to support the information. It didn't take me too long to find an ancestor (7th generation back). That is not verified by good sources and likely everything past him is incorrect. I was initially exciting about the public trees available, but then I realized many of them are not supported with good sources either. And, I don't think some of the information I found there was correct and therefor didn't want to add it to my tree. As I continued to look at this particular ancestor in family search and some of the collaborating notes to go with it, I found that there are diverse opinions on what is correct and what isn't. I found the wife of this individual that was added and deleted by more than a few people on different dates and the discussion as to why they think the information is correct or incorrect. I tend to agree with the incorrect crowd as the sources are not conclusive. From here, I started searching the 1700's in New York, particularly people arriving from England. I found names of ships, passenger lists and even some information about the passengers. Although I did not find anything on my particular ancestor in question. It was fascinating reading as why the came, how the came and the difficulties along the way. Learning the history of the time and place researching will certainly become helpful as I learn to do complete and exhaustive research. I still have much to learn to become a good researcher and genealogist but am exciting to keep learning as much as I can, which I assume will be a lifelong endeavor as there are so may different facets to family history work.