Congratulations on the house. Wonderful tree. I'd start with a plan that emphasizes the tree and lays out other structure. Since you mentioned a fence... maybe a gate or trellis passage where the walkway dies off? Drop in some stepping stones between there and the road. Just to make the walkway ending like that be more sensible. I've seen it where there is just a bit of fence either side of the entry gate/trellis, but that partial fence relates to fencing on the side or in back. With back/side fence, tree, walkway and gate/trellis as the structure, coax grass along and plan out a few beds. Just a few to start. (We just pick a spot and lay a tarp down untill the grass dies off). Then dig in. Flats of annuals drop steeply in price partway into summer and will last a long time where you are. Snap up perrenials and other plantings when you can - ask friends and family if they need anything dug up and divided. Your tree deserves a wide circle of mulch (less grass to tend and makes the tree happy and healthy.) Our town has free mulch at the 'recycling center' aka the dump. I like someone's earlier idea of continuing the walkway around to the driveway too though.... hmmm. You may find it easier to tackle removing part of that 'walk to nowhere' than trying to work with it. A walk, even gravel, curving by the tree could be very nice.

There really is nothing farmhouse about your home's style. The roof is Spanish. From the front, the board and batten and casement windows are contemporary. From the side, the house looks like it was a Garrison Colonial with the overhang filled in at one point. The solid wall makes it feel more contemporary. The extra trim around the windows look like they were added on at some point. This is a good example of an authentic, typical farmhouse. If you were to remove the front porch, it would be a typical Colonial with an addition on the back. This shows the overhang of a Garrison Colonial. Here, the entrance is in the middle rather than on the side. If you're curious as to what your house was look like when it was originally built, perhaps you can get a copy of the plans from the office that issues building permits in your county. You would more than likely be able to find elevation drawings that shows how the house was meant to look.

I agree the brick is fine but the shutters need to go. I actually think the current siding color with the roof and brick is nice. Garage door should be the same color to pull focus away from it. You want more focus at your front door/entry area. At some point you might think about a garage door with windows across the top. That can add interest and help break up the "wall." Larger light fixtures for the garage and front door would be nice. As gardengal suggested, beef up the posts and maybe the same for the window trim once the shutters are gone. Though this is an entirely different house, it gives you an idea of how the sage green gardengal mentioned could work with brown brick (or stone, in this example).

I don't see that the main tree needs any pruning. As you walk up to the front door along the path, it's nowhere in your view. It's really easy to make a tree look weirdly unnatural by injudicious pruning, and there's no road back. To me, the amount of bare brick on the side of the garage is not proportional to the rest of the house. It needs to be broken up visually. I seldom like shutters but they would add interest to the brick and I agree they would look good here. We don't know the width of the walkway, or the width of the bed between the walkway and the wall, which would help us make recommendations for what to plant. It goes without saying that you'd need to be sure the plantings do not cover the walkway. A bed on the other side of the walkway would need to be low ground cover, and it's purpose would be to visually beef up the landscaping on that side of the house, in order to make it more proportional to the expanse of brick. I like the idea of another tree or shrub near the driveway. I'd trim down the shrub to the left of the front door, so the window is more visible as you approach the front door. You have a very attractive house, it just need a bit of help to look its best.