It's a nice house! A few thoughts. You might upload a closeup of the brick on Sherwin Wms. or Benjamin Moore's site. It will pull some complimentary color possibilities for you. I would remove the shutters since they don't fit the three larger windows. I would also remove the white railing along the walkway. Paint the downspouts to blend with the brick. It's a little hard to tell in the pic...is the roof more brown or gray? At some point I would look for a more attractive mailbox. .

A cool grey paint will work. Consider changing the shutter color to a dark grey blue to contrast with the brick. You could paint the railing the same color a the shutters and add a row of landscaping in front of the rail.

Looks like your yard needs to be re landscaped starting with remove those three evergreens followed by new hardscape. . Agree re the paint & removal of railing.

Not knowing where you live, I would visit a local nursery & seek their advice. Most of them ( where I live) will plan a new landscape for you at a reasonable cost ( or credit your purchases).