If you want to shoot landscapes on 35mm star with an end in mind. Do you want big scenery or foreground interest? Do you want to compress perspective? The camera model is irrelevant, IMO, but the FM3A is a superb piece of kit.
My favourite set up is a 20 or 24mm, 35mm, 50mm and 85, 100 or 135mm lenses. With 4 of those lenses, the world is yours. If you really want the best out of your landscapes, buy a tripod and use Ilford PanF or similar. Maybe use an orange filter or a red if the skies are blue.
Most tend to like landscapes to be sharp front to back, so shooting at f8 or f11 tends to be a necessity - hence the tripod. A cable release is also a wise (and cheap) investment. I can't remember if the FM3A has a mirror lock up facility. If it does, use it as it will help avoid most of the risk of movement blur brought about from mirror-slap.
Have fun.