Would it be best to get aligned or braces for the situation of my teeth? How long would it taken for them to straighten? (photo)

I'm pretty close to a decent smile, but my two front teeth (what I mainly focus on) are pushed back I'd like to say at least 1/2 a centimeter, and do have a small crack between them, though I'm very positive, if they're pushed forward, it'll just close. Also it's currently 2:30 a.m, and I just took these photos, so my apologies for the angles and lighting. The photos don't do much justice, but I think it's better than nothing at all.

No doctor answers yet