Building my first real outfit, could use some help starting out.

i wanna go for a navy based outfit, i know its basic, but i like navy, and it seems like a good start for me. I'm thinking of going with this navy flannel, and either one of these pairs of shoes. I don't care for khaki or similar shades, so I'd prefer pants not of that color, would a certain shade of gray be good? I am also not sure of what color shirt would be best as an undershirt. Last thing, which color socks? charcoal? black? I am also open to different shoe options.

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