As far as the install, it really depends on your level of experience. Have you ever done a clutch/flywheel install before? on any car?
I'll start off saying, I work for Exedy....
So I dont want to get into a deep sales pitch with you, but if you plan to do a flywheel, you should do a clutch while you are in there... its an awful lot of work for only a flywheel. Even if you went with something like our stage 1 which will drive very similarly to stock, but will hold up to a bit more abuse.
I was considering just doing a flywheel in my 8th gen, as well, and keeping the stock clutch... but to be honest, if I am going to go through the trouble of pulling it all apart, I would like to not have to do it again any time soon... So I decided to do both whenever I get around to it.
Oh, and BTW: here is a DIY for clutch/flywheel:
DIY-- dropping transmission for installing clutch