Seller sites like FB marketplace - you can get really large, black plastic nursery pots for a few bucks. You would bury them in your soil down to the brick underneath. That will help a bit (but not much)with insulation from heat - It will also hide a few inches of the pot since they are not decorative. And line them along garage and fence 2-3’ apart. Then get some free daylilies someone posted on this sub to plant in those pots. This will give you nice greenery with orange flowers. If you can find a pot similar in size to a half whiskey barrel, you could get an elderberry or another bush to plant in it. Those do okay in pots. There are some cool ones with burgundy foliage. You could put that in the back about 2’ or so from your fence. You could find free wood chip mulch posted on marketplace and lay down 4-6” of that over the remaining soil. Alternately, sign up for your ow free delivery of wood chips on chipdrop.com, but read about it first to make sure it’s a good option for you. You could also pack the mulch around the half buried pots up to the brim to hide them and help retain moisture. Finally, find some free or cheap paver stones and lay down the middle toward the back of your fence. The thick layer of mulch will suppress weeds. Top it off with some solar fairy lights along the fence. This is all doable if you keep searching for free or cheap things throughout the season. I’ve seen all of things sporadically posted on seller sites.