States: Texas: Grayson
I don't know where you live, so can't say what would be your nearest source for researching microfilmed federal census records. Find out from local researchers where they go. There are over a dozen NARA branches across the country and I just happen to live within driving distance of one. Many of the larger public libraries with good sized genealogical collections also have complete sets of the filmed records.
Do you have a local genealogical society? Go to the GenWeb site for your own county, see what has been posted on local societies and libraries. If nothing there, then post a query and say you live locally and would like to know where other researchers go to find the microfilmed federal census records.
You might get some help attending classes on genealogy research. Our own local society offers classes for beginners, and then at our monthly meetings we have "workshops" on various subjects, to help people with their research. We even have classes on using computers and genealogy programs for computers.