The answer to your question is a tough one. There is no right or wrong answer when selling FSBO or with a realtor. You need to evaluate the pros and cons and decide for yourself.
I'm a realtor in AZ, so laws are different here than in OH so I don't know whether you need an attorney to prepare paperwork or not. From the previous 2 responses, it doesn't sound like you need one.
Selling your house is all about getting the "word" out that your house is for sale. Obviously a good price is extremely important, but if no one knows your house is for sale, they will never see it. There are multiple different ways to get the "word" out (Zillow, craigslist, MLS and numerous other websites that do the same thing). Realtors will obviously look at the MLS, but people without realtors will check craigslist and other sites that are similar.
If you are going to sell the house by yourself, you need to know how to price it. You need to be able to check comps in the neighborhood to see what houses are selling for and how long it is taking them to sell at that price so you know what price to expect and how long it should take to sell.
The best thing about using a realtor is that they help get the "word" out that your house is for sale. They also can easily pull comps and help you figure out a price. They show the house instead of you showing the house. They negotiate and hopefully can get you a better price for your home than you could by yourself. When using a realtor, they also inform their entire office of realtors what they have for sale, so they help each other sell houses. They help you understand what are normal "incentives" that you can use to help sell your home (such as offering to pay buyers closing costs or something like that).
If you know enough about all of this stuff and can post your house on numerous websites and get enough foot traffic through your house without a realtor, then I would say do it yourself. If you don't want to mess with this stuff and don't mind paying the extra money to have a realtor help sell your house, then use a realtor.
If you are going to get a realtor, I would suggest getting a GOOD realtor. Don't get a friend who just got in the business. You want an experienced realtor who is on the ball and knows their shit inside and out. They will help you sift through the BS that the buyers realtor might try and throw at you.
Good luck.