There is no need to be rude 🙄 This is Chat not AIBU. You would hate OP’s house, it’s been a long road for her making it into a home but she’s done an amazing job. Bold and bright is her signature style.
I wouldn’t bother with raised beds in a small garden if you aren’t a gardener. It’s an unnecessary expense and work. Come over to the gardening board, they are a lovely supportive bunch who will help you create what you want without judgey comments. They can advise you on what to best to plant depending on sun/conditions in your garden, things that are cheap, easy to grow, low maintenance, dog and child proof.
Knowing your taste, my suggestions would be big, tropical looking, jungle like plants eg Fatsia Japonica, bamboo in pots, bananas, Torbay palms (Cordyline) or something a bit eccentric like bedding plants planted in the order of the colours of the rainbow or stripes with climbers in the fences to save space. Pick easy to grow things like geraniums, nasturtiums, sunflowers to get you started.
If you are in London, you can pick up plants cheaply at Colombia Road flower market, especially at the end of the day when they sell things off cheaply to get rid of them. Aldi and Lidl also have cheap plants.