What's your budget and your DIY skill level? Some thoughts:

Low budget, low skill level:

--Clear out all the play equipment

--Lose the green trim and paint all those parts and the garage door the brown of the roof.

--Paint the front door a soft turquoise

--Replace the side lights by the front door with much larger ones in a bronze finish:

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Big bucks, big effort

--Pave the driveway. It makes a terrible impression.

--Create a walkway from the road along side the driveway all the way to the front door to make your entrance inviting. Use dark brown pavers for the walkway.

--Create a deep front garden bed with stepping stones to the stairway. Get a small garden shop to choose a mix of low shrubs and perennial plants native to your area to plant the bed with the stepping stones in the middle. Doesn't need to be curved like this, but this is fairly simple, again with some stepping stones within the bed to the stairway.

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--Get straight curtains on the inside and keep them open for a lighter, clean look to the house.

I agree on the deep planting beds, and along with that I would move the deck steps to end in the side yard where the play area is. I am interested to see any renderings/ideas about how to make you front door more prominent.

Are you planning to paint the whole house or just some of it?

Paint the whole house - instant upgrade. Use neutrals, a pop of color for the new, more attractive, front door. That garage door is ginormous- is a replacement possible? It should coordinate with the house colors and kind of blend in.

Switch out a panel of the garage door for one with windows.

Paint the house two colors close in value.

You could add an arbor over the garage and extend it to the front door.

It is hard to see, but there is an arbor over the entry and the garage.

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