Let me guess: Ancestry.com? But you know, they have free forums where ou can ask questions about people in your family, and many people are really friendly and will help out. Some people get snippy and tell you to pay for it yourself and quit freeloading. Lol! But I've connected with very distant cousins via the forums, and it is a lot of fun.
The Mormon church are big into genealogy, and will help you do free stuff. Some people don't want that because apparently the Mormons will baptize your ancestors as Mormons posthumously. Lol! I don't know if it is true, but there you have it. I'm not religious, so I really don't care. I went to their center in Salt Lake City, and found some fascinating stuff about my family. But if you find your local Mormon library, you can go there and they'll be happy to help. They don't try to convert you.
If you know where your parents were born, and have a good relationship with them, find out where your grandparents are buried. Some graveyards have their stones' names and other info (dates, epitaphs) online. Many yearbooks are being digitized, too, so you can look up people that way. Google "free genealogy resources" and you'll find lots of stuff to help. I'm not sure if you have any family tree software on your computer, but you might be able to find some free software somewhere. The Mormons used to have something called "PAF", or personal ancestral file, but they no longer support it. There may be a free replacement, so google it to see. I need to convert my file, so if I get around to it I'll PM you anything I find.
Also consider going through your families' attics- offer to clean out garages and attics and basements- you'll be amazed at the stuff you find.

But it's all a lot of fun!!