I make hanging baskets for work. IMO the metal ones you fill with moss are nicest as you can plant up several layers round the edge. You start with a little mat of moss that you put a couple of handfuls of compost/feed/water-retaining granules onto, then you put the plants to poke through the metalwork, and tuck the moss flat against the metal frame so that it holds the plant roots/compost.
I'd usually start with 4/5 trailers at the bottom of a 16 inch basket - surfinias and glechoma are my favourites but fuchsias, verbena, trailing pelargoniums and lysimachia all work well too. Then a layer with more 'filler' - people use lobelia, cheapie begonias, impatiens and so on. This is just for cost, though - you could use nicer things. Then a layer of 'thrillers' that are pretty - I love orange lantana, again geraniums and fuchsias and petunias and trailing begonias, and bacopa (which smells lovely); you can also put in things like bidens ('bee dance' is gorgeous) that will spread sideways. I'd keep building layers in tightly. Then on the top, you want a good upright thing in the middle - a zonal geranium or upright fuchsia, or ipomoea (lovely dark purple leaves) or a big begonia. Then you fill in with other things that are a mix of trailing over the edge and standing upright. Nice things include nemesia (some of it is scented), diascia, heliotrope, and little calibrachoas that will trail gently.
Remember to feed once a week when you're into growing season.
Hope some of those names are helpful when you go to buy plants!
FWIW I think your thistly thing is a thistle not echinops, but could be wrong.