Being new to guns an intro class would be well advised.

Most of the important stuff in the manual they'll cover in such a class. Do one or both of those, but the class is the better option IMHO.

Generally, when I get a new gun I sit down for a while and check it out. With it unloaded, I familiarize myself with any quirks of the design (for the most part autoloaders mostly work the same as each other with a few exceptions thrown in here and there) and then break it down to clean it. Given the number of used guns I buy that have no manual that just works better for me (and I'm going to do anyways).

Just make sure you understand very specifically how to handle and operate the gun before ever taking your first shot.