This is a recommended color from SW for Mindful Gray…homburg gray. I would do this on the shutters and the garage doors and leave the wood door as is. The two middle windows shouldn’t have shutters as the won’t fit appropriately, but you are not painting the siding and the darker outlines of the shutters will show if you don’t replace what was there. Personally, would like the house with out shutters and would probably paint the siding and garage doors and have no shutters at all.

If you make the other changes as suggested, I don't think you'll feel the need to paint the brick. There's no sense creating a maintenance issue where there is none now. The house has the potential to be very handsome. Some pretty pots with flowers on either side of your door will add some color as well. Don't forget that nothing looks pretty this time of year when trees are bare and lawns are brown.

Agree with celerygirl, the garage door should blend with the brick or be the siding color. Notice how your home is more inviting with the garage door painted the siding color and the front door is an accent color? Accenting the garage door draws the focus to the garage which is a utility area and not an area to be featured. Some people do like to add a wood, or wood look, garage door to make the garage area less utilitarian. The front door is where you want the focus - it makes your home welcoming when the front door is lighter and brighter and not a black hole. There are times to have a beautiful black door, but it would in a home where the front door isn't recessed into the porch area. Or if you had the surrounding sidelights and trim area a contrasting color, like white (wouldn't work on your house). No shutters. Your home looks 100% without shutters. https://www.lifeofanarchitect.com/residential-architecture-101-shutters/

Snap a photo on a sunny day then use the Sherwin Williams ColorSnap app to play with the colors. I would select a tone slightly darker than your mortar for the garage door and a color slightly darker than your darkest brick for the front door. I would then on the garage door install magnetic faux hinges and windows; this will add detail to the door, like the below house. I know they can be found on Amazon, not sure where else. Before: After: