I also felt hesitant at first, but as mentioned by other posters, just plowed on.
First, your basic PA should work fine.
Next, once you have a signed PA, find your title company. If you plan to self close than you will need to do a little state specific research and get a state specific warranty deed. Most of what you need (ie some states require an afidavit of value signed and notarized) can be found out by called the county recorder.