Re: Getting Started
Ideally, you should create a test site with the same server environment you have now along with the plugins and theme. Then install BuddyPress etc. and do the BP Compatibility process then some exploration and testing of other BP plugins.
Now, if you are adventurous, you can always back up your database and server files, then proceed with the BuddyPress installation and then the BP Template Pack plugin, etc.. If anything goes awry , you can always revert your installation to what it was before with your back ups.