Should be fine with pervoskia , try planting with salvia carrodonna and alchemilla mollies for late spring summer and Pervoskia with verbena Bonarises for late summer /autumn . you can added allium / other bulbs like crocus etc , allum nigrum would look good with salvia as do must other alliums . Getting suitable height will be the biggest problem maybe a climbing roses trained across it ? All the plants I've mentioned can be substituted for something else like nepata - Erysium B maulve for the salvia etc. I'll leave you to it football started
You are learning Amphibios - gardening is the long game !! It's best to plan, get inspired by photos like those on here, and then prepare. If you've got some seeds and you want some colour for this year (while you're planning ), then by all means sow them. Just make sure you prepare the ground, get rid of any big stones, weeds etc. before you sow, to give them the best chance. You've definitely come to the right place for advice !
there’s too much grass, OH doesn’t fancy digging any more beds