You might want to sneak there. Think about starting with something like Aperture Priority of Shutter Priority mode (Av and Tv respectively on your dial - I assume) to get a better feel.
So let's say you use Tv (Shutter Priority - Tv means Time value) and you set it 1/125th of a second - you will notice that your aperture changes. Outside in the sun it becomes quite small (f/16 or f/22) but inside it opens wide up to let more light in (f/4 or even f/2.8 if your lens can open that far).
Conversely, you can shoot using Av (Aperture priority) which means you'll set the lens aperture to a fixed opening width. Let' say you set it to f/4, you will find that inside a well-lit building you're getting normal shutter speeds, like 1/60th of a second. But outside in bright sunlight the camera wants to shoot at 1/500th of a second.
As you get more comfortable with these settings, and understand how they might affect your image, you can increasingly just swith to full manual.
Sometimes I use the camera's internal light meter to tell me whether I'm ok based on a certain setting. I'll be shooting Av mode, and want to get a great depth of field - I want everything in focus at a family dinner. So I'll set the camera to f/8 and see how my light meter is setting my shutter speed. But it's cloudy, and everything is sorta lit the same, and I see that most of my shots are between 1/60th and 1/125th of a second. I'll switch to manual, keep my aperture at f/8, set my shutter speed to 1/90th of a second, and then stop worrying about it. It allows me to just compose pictures.
There's a little more to it that that - next (but less extreme) is the ISO setting, you may (or may not) be able to use that to compensate, as well as Ev - exposure compensation.
Finally, you will want to know your medium - how forgiving is the film that you're using, or in your case how good is the Evolt's sensor at pulling out details from a slightly under-exposed shot. My understanding is that it's actually pretty good, so your margin of error is wider - always nice to know.