Hostas fill and split quickly. Looks like you've got some already ready to be split in the bed close to the house. Repeating those down the walkway would be nice.

I wouldn't edge the walk with stacked rock since that bed doesn't sit any higher than the walk or grass. Just a hidden plastic edging strip to keep grass from encroaching the beds would be enough.

I also don't think I'd try to link the house beds with the walkway beds. Instead I'd continue paver blocks over to the stairs so it mirrors what is on the other side and defines each bed.

Good luck!!

you need a tool like this, called an edger. its really easy to do, and the result will look like the second photo. meanwhile, you need to fill in with annuals (inexpensive! flower all summer!) until your perennials settle in. odd numbers, in groups, look better than soldiers on parade.

Very nice start! You've avoided the usual beginning gardener error of making your beds too narrow nicely.

I'd split the large hostas and replant along the path. Repetition is a good thing in a garden. Buy more of the other perennials you have and plant in larger groups too. If you want to do this right then buy a plant for each foot of border, you don't have nearly enough plant material and you will be frustrated by the slow rate of improvement in the beds. Plants like company and you won't be so annoyed by weeds.

Or buy several flats of annuals in sorted colors, not mixed. White vinca, orange marigold, yellow/purple johnny jump ups maybe. Don't buy alyssum as it reseeds like mad and while I love having free plants it would be too many free plants! I adore the low growing annual vinca as it is so heat and drought resistant, cosmos is something that is airy and charming. Geraniums might be nice and you can take cuttings for winter house plants and put back in the ground next year too. Zinnas in a bushy shorter form and french - not the tall African type - marigolds if you like hot colors. I make an exception for zinna, adore every color they come in. Plant each tiny plant 6-12" apart so it fills in nicely this year. You will need to water a lot and fertilize lightly monthly which those hostas will love.

I prefer to separate my beds from lawn with mowing edges, bricks/broken concrete/stepping stones that lay flat so the mower wheel can ride on it. Once you decide on and have acquired the edging then make the border's edge more swoopy as you install the edging. I like to use true radii by drawing curves with a string and a stake. My front garden is a true circle and the back lawn is a line parallel with the back fence and partial circles fitted around my beloved apple tree with an arc cutting towards the side fence from the patio corner for instance. If I just did the fence lines without the partial circles it would look cramped but the true radii look logical and spacious. Put that stake in so the arc made is the size you want, it is a guide to make a good strong curve rather than some geometry exercise. I see you need an arc because there's a small tree for starters. I might put the stake at the driveway edge to start and move it to the other side of the path if the arc is awkwardly large.

I'd also prefer to see the border end perpendicular to the sidewalk. Not sure why but I really like a punctuation point at the start and end of walks, something with a definite shape that's usually taller and not repeated elsewhere. Since I have plenty of room I use tree roses and my only sort of sheared shrub - an evergreen star jasmine.

The border between house and walk plantings is a non issue. Once plants are covering the ground it will be fine.

I think you had the right idea, I think the beds are just too wide. If you brought them in a little tighter to the walkway and humped them up a bit with cleaner/more defined edges it would look great!

The beds are not too wide if you are using hostas.

There are all types of hostas that can be placed along the path. You won't find the best ones at the big box stores. Try a local garden shop or a yard sale,

Will look beautiful when done and add a ton of curb appeal. If you can go with some random lighting vs. solar which are hard to keep straight among other issues. If you can go the route of getting it wired try some ambient path lights! Would look so pretty at night.

June, a couple of seasons to get them to mature if you buy the small ones in the pots. When I lived north, there was always someone in the neighborhood, maybe a Craigslist ad, who is willing to divide their mature hostas for $$.

June, hostas like these should be fine (with water!!). This is in my back yard (it's a stone path that leads from the back to the front yard). I'm sorry, I can't remember the name of them. Basically, choose hostas with tough, big, bluer leaves. These took only one year to look like this. The little delicate-leaf hostas and the light yellow/green variagated ones need a lot more shade than you have, so don't' waste your money on them for your walkway. Even here, it's a part shade situation. They're thriving with the astilbe and ferns (don't do those they definitely need shade). Russian sage will fill in very quickly and be very little maintenance (plus you can go on vacation and they'll still be alive when you get back).