Hostas are fine with sun as long as they've got plenty of dampness at the roots. However, they are slug and snail fodder so unless you have time to go out on slug hunts in the evening ...
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
Another vote for ajuga from me. Will quickly form a nice mat so good to stop the cats. Bits are easily pulled up and put elsewhere in the garden if it grows where you don't want it. Only attention I give mine is to trim off the old flowers to tidy it up. It's evergreen here with me in Scotland, and even grows in very dry shade under an old oak tree. Might also be nice to pop some wee tete a tete daffs in there and some other little bulbs such as chionodoxa ... they soon spread too.
Another shout for ajuga - doesn't need much looking after, spreads quickly, slugs don't eat it, looks gorgeous, has really pretty flowers, and comes back even when you think a patch is dead.
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Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
https://www.fibrex.co.uk/collections/ferns
Gardening in Central Norfolk on improved gritty moraine over chalk ... free-draining.
https://www.cranesbillnursery.com/all-plants/geranium-sanguineum-album