a quick soak and scrub will clean it up nice. the main thing to watch for once you put a blade in it and close it up, is to be sure the doors are tightening down evenly, and that the gaps between the blade and the guard are pretty close on each side. That shouldn't be a problem, but you never know.
I would recommend finding a blade sampler pack and trying out a few. I wouldn't recommend starting with feathers straight off, they are considerably sharper than most, so are less forgiving to learn on. Every razor and every face has a blade that works best for it, so rather than tell you which one to use, its better to try them all (and at a couple bucks a pack, its cheap education) the reason I say that is some of my favorite blades don't work at all for others, and the most commonly mentioned "starter" blades don't work the way I'd like for me. But I think most guys thing feathers are the sharpest.
Its also a great time to switch to a brush and soap if you have not. by far better value and a better shave than canned gunk, and your skin will do better as well.
Manitic59 on youtube has some great tutorial videos on getting started.