Yes, these are the four main places to start searching. I suggest you go to http://findagrave.com/ after you have searched on http://familysearch.org/ . Ancestry.com is really good, but has a monthly fee. The way around that is to go to a nearby LDS FamilySearch Family History library where they have a contract with Ancestry.com and you can search under our license. There are advantages to having your own membership such as you can contact people who have made entries. Using Google and Google Images to search often deliver suprising new finds. There are advanced Google Searches one can learn such as Boolean entries. Click here for an article on that.
So your assignment for day 3 is to use all of these sites to research. Keep track of your searches so you don't duplicate your work.
I am attaching above, an example of how I color code (with highligher pen) to keep track of what I have found. I also add a black ink T when I attach the source to the tree. In this example the red is when I find them on findagrave.com the yellow is birth sourced, the green marriage, and the orange is when I find them on a census by writing in the year.