Hello Prabha, if you need help with the layout of your garden, I can help. I always ask my clients first what features they want and how the garden should function. If you like I can send you my questionnaire which could help you to get clear about what you want to achieve the garden of your dreams. You can also check out my website for more inspiration: https://studiohummingbird.com/

I think you should have planting all around to cover the fencing and wall. As to a design, I suggest you look on Pinterest and Houzz for garden design ideas. The tv programme Garden Rescue is also very good for ideas (Iplayer) and they often design interesting gardens that are not just a square and they always incorporate a water feature!

Usualy siting area would be place where u got the most sunlight during the day. U can enjoy sun bathing all day long👍🏻In case if u hade enough of sun , portable decent quality garden umbrella would be a good idea. Against the wall u can instal a trellis and plant some climbers that would give a decent look to the garden. Regardless planting completely your go. Somebody will go ahed with a bigger planting area equal to a maintenance , a loads of time spend looking after the plants. By the look of it there is a plenty grass and generally space to position the bed either way rise ones or flat beds with a level of the grass. Multiple option, garden is ready to be landscaped .Usually customers know what they wants soo it is just a matter of navigate them a bit .. As well up to the budget for the project .. U can have anything u want really . It’s like a bare field ready to be landscaped . Planting a trees usually would result with a maintenance but it might be really eye catching if u will implements some lights in the garden. Trust my this really matter a lot , imagine nicely illuminated Magnolia or a Cherry three when will bloomed … That would be impressive … Like i says, clearly there is plenty of room to work out design. If any help is required or advise feel free to drop a message , that doesn’t cost nothing👍🏻
Best. Straight Forward Gardens Ltd

All I will add is, it's worth getting in a professional to help with the space, to realise what is achievable within your budget.

Very important, do your research to who you choose, not all landscapers are designers! they don't know a Narcissus from a Bellis perennis!

Ian