8.2 is not available, 8.1 is... as well as being able to update some things to 8.2 content but there are only hybrids.
As far as 8.1 goes,
There is a guide...
There are tools to work with on the server...
There is a help thread for your questions when you get stuck...
There is a developer team search thread when you decide you can't do it...
All of these are conveniently stuck at the top of these forums.