I cant even imagine living in Denver, and not having a storm door, to protect that beautiful door. I would add a white storm door, and some colorful pots on the porch.

I would paint the door and trim a contrasting color to the brick. Maybe a green, anywhere from sage to forest. I also like the door knocker idea.
But the big issue I see is the awkwardly small stoop at the entry door. I would bring that stoop out at least 3 feet, and a foot or so on either side of the door.
Also a larger, more prominent light fixture would help.
Not to mention some landscaping would go a long way with all that brick...

Your stoop is too small. So is the “porchlet,” the sidewalk, and the light (which is mounted too high). And your home numbers are nearly invisible.

Handsome brick home, by the way.

Not really anything that you can with trim around the door because the top of the door is so close to the soffit.

I built a small cedar planter box out of some scrap cedar that I had and hung it beside my front door. 16" long x 7" wide x 6" deep. During the summer, I plant it with impatiens. In the winter, I arrange cut evergreen boughs in it. Something like that or a decorative mail box would look good on your house, soften things up and add some color/ interest.

Spray your house numbers with oil rubbed bronze spray paint so they stand out better. Change your light to something in bronze and a bit larger and more modern.

Full view storm door- same as trim color. Your door is arts/crafts- a large stain glass exterior light, move the house #'s to opposite side, dark color (same height)