If you want an outdoor sitting area on a budget maybe look at DIY pavers or decking systems from the hardware store, and a shadesail between the wall and a pole concreted into the ground.

Large pavers would be economical,decking, a simple pergola that you could add screens or battens or a shade sail as suggested, a bit of planning and you could achieve what you are after.

With overhead built structures you need to check what your local council requirements are. If you need to go through an approval process that adds to cost, and if you bypass it you have problems when selling.

Cheap and cheerful is my area of expertise lol! tidy up and clean the bricks and then maybe add a recycled brick patio. You might get them cheap on gumtree, or find someone chucking out paving or bricks. Then it's just laying it over sand. Or like me, I laid the old bricks i found under my house straight on the grass and let it grow through the cracks because i like how it looks. once planted around the edges it looked good. The trick is sourcing some old bricks or pavers! if the brick yards have remnant bricks in small amounts and mix them up. it doesn't matter if it matches, even the bricks with holes can be used sideways. broken bricks are fine too. I have even used sections of old broken concrete in the mix. It would tie in beautifully with the old brick and if you create a cute sitting spot, maybe with a colourful bench to sit out and read a book and have a drink and a chat. I would leave a gap near the wall and plant some small flowers in bed at the base of a flowering climber like jasmine, rose or clematis. then plant herbs and flowers in pots and cluster them around. I simple umbrella or shade sail can be enough to make it a joyful spot to sit.

Thanks nice idea