Budget? If selling now, ask your agent what's cost effective in your area.

I'd remove the tree and all of the bushes that are close to the porch. Add a mulch bed there with flowers. I'd also add some flowers along the driveway. Finally, add some chairs on the front porch.

Leave the tree that's near the sidewalk, but the rest of your landscaping could use a refresh. The tree/tall shrub close to your house looks like an overgrown bottom-bare cedar/arborvitae but it's a bit hard to see it from your one picture.

Is the gate to the right yours or is it your neighbor's? The trailer behind it is not particularly attractive. Maybe a solid gate would look better, or some wood added to your metal gate, to block the view through.

Make sure the planting space separating steps from drive is planted solid with some low form of plant. Colorful would be OK if it is durable. But green would be fine, too ... so long as it is tidy looking.

The picture is not good so very hard to tell but I suspect the lawn in the raised portion of yard (around the tree) is not looking good. Work on transforming it into a lawn of green velvet. If it's not grass, make sure that whatever groundcover it is is solid and dense. If it's the case that is grass and it has died where it is in shade from the tree, then you need to separate the shaded portion into a groundcover bed while you improve maintenance on the grass. The bed should be nicely shaped to coordinate with the surroundings. (You'd need to submit a base plan if you want help on that conversion here.)

The porch area does not look inviting. But it's too far away for us to see and to make specific suggestions. Generally though, get rid of the obscuring shrubs. Widen the approach walk. Add some color near the steps. Plant low plants as foundation plants in front of the porch. Slightly higher plants could be used at the base of porch posts.

Swap out the uppermost panel of the garage door for one with a bank of windows across it.

some ideas:

The style of the brick fence doesn't match the home's style. Hedge needs to go and garage door needs something major done to integrate it.