The FM2 was/ is seriously good. This was one of Nikon's semi-professional models, and back then the Nikon badge was just as prestigious as it is today.
Considering the age of this camera, you do lack some features that are considered standard today, such as auto-focus, scene modes, etc, and to an extent these modern creature comforts do make life easier. The FM2 does have all the features that matter, however, and I personally find that using a beautifully constructed 100% mechanical camera vs. a plastic box of electronics brings its own kind of satisfaction. Actually, the businesslike simplicity and bullet-proof build quality of the FM2 still make it a favorite with college photography majors.
There's probably already a few lenses with that FM2, but you can always buy more. All but the newest Nikon lenses will work on the FM2 (Nikon's so called "G" lenses don't have an aperture ring), and every lens that you use on the FM2 will also work on all of Nikon's digital SLR cameras... although if you do decide to go digital, you'll probably prefer auto-focus lenses.
At any rate, it's a great camera. Hope you have fun with it!