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This video by Technology Connections talks about how window awnings can greatly help cool your home.
Another thing I want to add is that window awnings can protect windows. We get pretty big hail here, and (wood or aluminum) awnings can save your window glass. I have also heard of “Clamshell Awnings” which are on hinges, so you can remove the poles and lower the awning to cover and protect windows in extreme weather.
Lastly, here are some old window awning ads for your entertainment (from Wikimedia commons)
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Building your own awning isn't terribly difficult. Time consuming, but if you're just looking for shade and aren't terribly picky about aesthetic, you can make due with some wood, PVC piping, and fabric. Can even get fancy, set it up so you can roll it up around a pipe for storage/safety.
I encourage everyone to try sewing, but it's not for everyone. The machine is a barrier to entry. Your home machine will not cut it. Or you may be able to struggle through but you'll suffer with thin thread that will dissolve in a season or two.
Canvas work is a trade with a wide skill set that not a lot of people possess. You can tack a sheet to your wall and put some posts under it but making something that looks nice, survives storms and lasts for years takes effort and skill.
I'm a canvas guy.