My mom and mother-in-law both were doing geneology stuff, so I got into it. Ancestry usually gives a 3 day trial away to new visitors. I used those 3 days to type in as much info as I could, and found lots of great stuff. Once the free trial ends, you can still access what you've typed and add to it, you just can't see their hints on expanding the lines or use any of their records any more. My mom bought the subscription, and has traced one family line back to the 700s!!!! The best thing about Ancestry is One World Tree. If you type in a person who matches someone in another family line, it shows you decendants that are listed in that family tree, so you don't have to type all that in yourself, and you can use the research someone else has done.
The one caution for that is that this is all entered by someone, and you don't know how thorough their research is. My mom found a queen in our family line from the 900s, and when I googled her, there were a couple different husbands listed at various family tree sites. Based on the dates, I think one of them is wrong, but I can't verify which! :)
If you're close to Fort Wayne or can spend time at the main branch of the library, it is one of the best geneology libraries in the country. I think I heard you can access ancestry.com and some other online websites while you're there, too.
I would suggest you have a plan ahead of time of what you want to find. If you're just trying to see how far back you can trace the line, Ancestry is probably a great bet. If you're going for thoroughness (birth/death certs, military records, deeds, letters, etc.), go to the library and talk to someone who can direct you through it all.
Good luck, and try not to get addicted! :)