My back garden faces north so only gets full sun before 9am and after about 3pm when the sun is up. We have no neighbours t cast shade but the house does so parts of the garden are in full sun in mid summer but the couple of metres immediately behind the house get none between 9 and 3 though there's plenty of light.
I grow clematis Nelly Moser, Blekitny Atholl/Blue Angel and Ravarrhinne on the back wall and have tried roses New Dawn, Guniée and Falsatff, all of whom grew well and flrwoered well for several seasons but all of which have been clobbered to death by frosts below -20C in recent winters.
I use the area at the back of the integral garage as a work area and the aea behind the hall and dining room as a terrace. Then there's a dampish bed planted with Japanese anemones, ferns, chelone, astilbe, assorted primula, snakes head fritillaries, astilboides, hostas, a couple of dwarf conifers and some hackonechloa grass in there and very happy. Further along I have a mix of hostas and hardy geraniums.
The rest of the garden gets a fair amount of sun so I plant all sorts of things - clematis, assorted shrubs, aquliegias, thalictrums, hemerocallis, phlox, hardy geraniums, sedums, peonies, rheums, roses, persicaria, iris, ornamental grasses in the carex and miscanthus families and many more.
We also have a veg patch which does very well with rhubarb, soft fruits and salads and things like fennel, beetrrot and broccoli but is now proving too cold for winter veg but I doubt your winters are as cold as ours have been recently so no reason for you not to try.
I suggest you spend your first year in teh garden waiting to see what grows as much will be lurking under the soil waiting for spring.. There'll be plenty for you to do cutting away the old dead growth from perennials, tidying up shrubs and cleariing paths. Be ready with wildlife friendly slug pellets in case hostas and hemerocallis emerg as slugs love to munch their new growth. Take photos and make notes of plants you want to keep, multiply, rejuvenate or get rid of and also gaps where you can introduce new plants. Fill any obvious gaps with easy annuals this year till you see what you have and what you need.
Most of all, take the time to observe and enjoy whilst deciding how best to improve to meet your needs and ambitions for the garden.