Planning a side garden with low-maintenance shrubs & flowers – does this sound like a good idea?

I’m planning to transform the patch along the pedestrian path (leading to shared parking) into something tidier and low-maintenance.

The idea is: — A garden bed running along the length — 10mm shingles around it (maybe topped with larger gravel for looks) — Weed control fabric under the stones, with edging to hold everything in place.

Weedkiller didn’t work, so I’ll be digging out the grass and weeds. Still debating: should I put weed control fabric under the garden bed too, or just under the stones?

questions:

Would you place the bed near the wall or center it in the patch? Cream stones were added to prevent rats. Will replace it with shingles too.

A local seller has these young plants — are any of them known to be a nuisance or overly invasive? Any other pocket friendly options from BM garden center – have one nearby.

Buddleia (Butterfly Bush) Snow Lady Daisies Purple Hebe Agapanthus (Blue) Elephant Ears Coral Bells Foxglove (Digitalis Pink) Russell Hybrid Lupins (Purple)

I also would like add a couple of rose varieties (if I don’t find concrete under the grass). For reference, I usually grow marigold, nasturtium, ostrich feather, and sunflower from seed.

PS: The fence panel is now replaced with a gate. The section marked in orange may get some paving later to link the path or for taking bins out.

Would love any thoughts on layout or plant choices!