Well, we know 87's are the fast ones! j/k joke from another thread. Welcome!
You picked the right bike TW's are awesome!. The one you found sounds ok, clutch parts are easy to replace with basic tools and the parts are cheep.
Bring one of your friends who knows bikes with you to look at it. Make sure it has good compression, the oil looks good, no leaks, no rust in the gas tank, runs and sounds ok, etc... the basics. Your friend should know what to look for. If not ask more questions here. We will help you out.