I like your brick home! I do think that adding a nice wide walkway and landscaping will boost the exterior appeal. Don't add shutters. Your windows aren't designed for shutters - they are too wide and modern (which suits your home's style). Here is a link to a brief article written by an architect to show you why you wouldn't want shutters on these windows Shutters vs Shudders
I think once you implement a good landscaping plan and new walkway, you will see how lovely your home is as it is. A local landscaping company should be able to come up with a plan using native easy maintenance type plants so you don't have to spend much time gardening.
I also like your front door in white, but if you want to change it, consider something in the greens. Here is one example of a bright green front door with white trim that would look great with your home IMO:
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master bathroom and closet and
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