I'm not handy at all, unfortunately. I don't know anyone who is.

I see you like lots of colors and rainbows. Buy several exterior spray paints and paint each chair a different color. Add pillows in outdoor fabric and an outdoor rug. Most businesses in the northern hemisphere are having clearance sales on summer merchandise now, and check on Craigslist, freecycle if it's in your area, salvage stores, second hand stores and local garage sales. Start with some large pots with colorful and scented flowers or foliage, you could even spray paint the exterior of a cheap plastic pot before planting, coat a painted pot with clear sealant, or use salvage pieces for something unique. You can make your own pots with cement and mosaic with pieces of broken ceramic, marbles, shells, etc. Add string lights, lanterns, candles. Wind chimes, bird feeders. Oh yes, and friends over for a potluck!

Wall planters from salvaged containers

A ceramic pot turned into a fountain with a kit

Make a bottle tree: Bottles are inserted on the branches of a dead tree or larger limbs tied together. According to folklore, the bottles capture bad spirits roaming in the night.

[https://www.houzz.com/magazine/how-to-spruce-up-your-patio-for-summertime-fun-stsetivw-vs~48222556[(https://www.houzz.com/magazine/how-to-spruce-up-your-patio-for-summertime-fun-stsetivw-vs~48222556)

some fun ideas here for repurposed items: [https://www.houzz.com/magazine/my-houzz-funky-charm-for-a-live-work-space-in-austin-stsetivw-vs~19307423[(https://www.houzz.com/magazine/my-houzz-funky-charm-for-a-live-work-space-in-austin-stsetivw-vs~19307423)

[https://www.houzz.com/magazine/my-houzz-a-handcrafted-bohemian-homestead-in-texas-stsetivw-vs~27471236[(https://www.houzz.com/magazine/my-houzz-a-handcrafted-bohemian-homestead-in-texas-stsetivw-vs~27471236)

[https://www.houzz.com/magazine/budget-decorator-10-ways-to-deck-out-your-patio-stsetivw-vs~29164555[(https://www.houzz.com/magazine/budget-decorator-10-ways-to-deck-out-your-patio-stsetivw-vs~29164555)

on the practical side, buy a large barrel and a downspout converter kit to collect runoff water.

https://www.houzz.com/magazine/just-add-water-rain-barrel-magic-stsetivw-vs~15016724

A new umbrella would be about as much as your neighbors can stand. If you want a riot of color, take up gardening as a hobby and look at creating a nice planting bed there with a water feature using a colorful pot. But, gardening is work. It isn't set and forget. Nothing outside really is.

Are you keeping the seller's furniture?

Is the budget $100 or less? If so, buy two plastic Adirondack chairs in bright colors and a small table to go between them. Add a bright colored market umbrella or a simple sail shade when budget permits. Labor Day sales often have summer remainders.

Buy a dining table first that will hold a bright colored umbrella that you choose to compliment 2 new brightly colored plastic Adirondack chairs. Place dining set in right corner area and chairs in L shape up by basement window on left. Add some larger grouped planters in complimentary color. Use what you have now to place furniture. Late in the season so you might have to wait. Everything you own now is neutral so you don't have any color. After chairs and umbrella, invest in 2 toss pillows and an outdoor rug to compliment.

You are going to have a problem with the drain spout emptying onto your cement floor. Look into moving it. The floor will become slimy so it'll be slippery. It could even direct water into your foundation.
We stained our cement red, but we live in warm weather all year round. I don't know if it would work in your area.

Wow! I love all of these ideas! csch - that first picture is awesome!!!!! I will love, that, but I don't know how it can last with the winds we get. The carport I have was torn to shreds within 2 years. I really will love to do something like that, but I don't know what is cheap and durable. I love all of the other ideas. I don't have a green thumb, but I am still going to attempt it. I want lots of colorful flowers. I want to add privacy where I can be isolated, so I do need to plant tall, full plants or trees. I was thinking thuja giants, but I hear they get sick easily, but I really love how they look. That will probably be in the future. I have to start small with what I have. I wonder if I can get an umbrella and hang things off of it like in the first picture? I definately want to do the colored chairs. No- I won't be keeping what is out there - the person there is renting, and they are taking it. It's just going to be that slab. The drain spout and foundation are being taken care of - that was the first thing I noticed. I love the idea of having red cement. I love red!